diff --git a/src/app/+item-page/simple/item-types/shared/item-relationships-utils.ts b/src/app/+item-page/simple/item-types/shared/item-relationships-utils.ts
index 12a87c2277..6ef035f1e6 100644
--- a/src/app/+item-page/simple/item-types/shared/item-relationships-utils.ts
+++ b/src/app/+item-page/simple/item-types/shared/item-relationships-utils.ts
@@ -1,14 +1,11 @@
 import { combineLatest as observableCombineLatest, zip as observableZip } from 'rxjs';
 import { Observable } from 'rxjs/internal/Observable';
-import { distinctUntilChanged, flatMap, map, switchMap, tap } from 'rxjs/operators';
+import { distinctUntilChanged, flatMap, map, switchMap } from 'rxjs/operators';
 import { PaginatedList } from '../../../../core/data/paginated-list';
 import { RemoteData } from '../../../../core/data/remote-data';
 import { Relationship } from '../../../../core/shared/item-relationships/relationship.model';
 import { Item } from '../../../../core/shared/item.model';
-import {
-  getFirstSucceededRemoteDataPayload,
-  getSucceededRemoteData
-} from '../../../../core/shared/operators';
+import { getFirstSucceededRemoteDataPayload, getSucceededRemoteData } from '../../../../core/shared/operators';
 import { hasValue } from '../../../../shared/empty.util';
 
 /**
diff --git a/src/app/core/cache/builders/remote-data-build.service.ts b/src/app/core/cache/builders/remote-data-build.service.ts
index bc03ce3d52..ae3b0e4fd1 100644
--- a/src/app/core/cache/builders/remote-data-build.service.ts
+++ b/src/app/core/cache/builders/remote-data-build.service.ts
@@ -1,13 +1,7 @@
 import { Injectable } from '@angular/core';
 import { combineLatest as observableCombineLatest, Observable, of as observableOf, race as observableRace } from 'rxjs';
-import { distinctUntilChanged, filter, map, startWith, switchMap } from 'rxjs/operators';
-import {
-  hasValue,
-  hasValueOperator,
-  isEmpty,
-  isNotEmpty,
-  isNotUndefined
-} from '../../../shared/empty.util';
+import { distinctUntilChanged, map, startWith, switchMap } from 'rxjs/operators';
+import { hasValue, hasValueOperator, isEmpty, isNotEmpty, isNotUndefined } from '../../../shared/empty.util';
 import { createSuccessfulRemoteDataObject$ } from '../../../shared/remote-data.utils';
 import { FollowLinkConfig } from '../../../shared/utils/follow-link-config.model';
 import { PaginatedList } from '../../data/paginated-list';
@@ -15,12 +9,7 @@ import { RemoteData } from '../../data/remote-data';
 import { RemoteDataError } from '../../data/remote-data-error';
 import { RequestEntry } from '../../data/request.reducer';
 import { RequestService } from '../../data/request.service';
-import {
-  filterSuccessfulResponses,
-  getRequestFromRequestHref,
-  getRequestFromRequestUUID,
-  getResourceLinksFromResponse
-} from '../../shared/operators';
+import { filterSuccessfulResponses, getRequestFromRequestHref, getRequestFromRequestUUID, getResourceLinksFromResponse } from '../../shared/operators';
 import { PageInfo } from '../../shared/page-info.model';
 import { CacheableObject } from '../object-cache.reducer';
 import { ObjectCacheService } from '../object-cache.service';
diff --git a/src/app/core/cache/server-sync-buffer.reducer.ts b/src/app/core/cache/server-sync-buffer.reducer.ts
index ff143a822a..7b65db0fbb 100644
--- a/src/app/core/cache/server-sync-buffer.reducer.ts
+++ b/src/app/core/cache/server-sync-buffer.reducer.ts
@@ -72,7 +72,6 @@ function addToServerSyncQueue(state: ServerSyncBufferState, action: AddToSSBActi
   } else {
     return state;
   }
-  return state;
 }
 
 /**
diff --git a/src/app/core/data/relationship-type.service.ts b/src/app/core/data/relationship-type.service.ts
index 23e56e31c9..bd279dbb0b 100644
--- a/src/app/core/data/relationship-type.service.ts
+++ b/src/app/core/data/relationship-type.service.ts
@@ -3,9 +3,9 @@ import { Injectable } from '@angular/core';
 import { Store } from '@ngrx/store';
 import { combineLatest as observableCombineLatest } from 'rxjs';
 import { Observable } from 'rxjs/internal/Observable';
-import { filter, find, map, switchMap, tap, mergeMap } from 'rxjs/operators';
+import { filter, find, map, mergeMap, switchMap } from 'rxjs/operators';
 import { AppState } from '../../app.reducer';
-import { isNotUndefined, hasValue, isNotEmpty } from '../../shared/empty.util';
+import { isNotUndefined } from '../../shared/empty.util';
 import { NotificationsService } from '../../shared/notifications/notifications.service';
 import { followLink } from '../../shared/utils/follow-link-config.model';
 import { dataService } from '../cache/builders/build-decorators';
diff --git a/src/app/core/data/relationship.service.ts b/src/app/core/data/relationship.service.ts
index 2bb1c1d912..6d9b237db0 100644
--- a/src/app/core/data/relationship.service.ts
+++ b/src/app/core/data/relationship.service.ts
@@ -1,31 +1,14 @@
 import { HttpClient, HttpHeaders } from '@angular/common/http';
 import { Injectable } from '@angular/core';
 import { MemoizedSelector, select, Store } from '@ngrx/store';
-import { combineLatest as observableCombineLatest, OperatorFunction } from 'rxjs';
+import { combineLatest as observableCombineLatest } from 'rxjs';
 import { Observable } from 'rxjs/internal/Observable';
-import {
-  distinctUntilChanged,
-  filter,
-  find,
-  map,
-  startWith,
-  switchMap,
-  take,
-  tap,
-  mergeMap
-} from 'rxjs/operators';
-import {
-  compareArraysUsingIds,
-  paginatedRelationsToItems,
-  relationsToItems
-} from '../../+item-page/simple/item-types/shared/item-relationships-utils';
+import { distinctUntilChanged, filter, map, mergeMap, startWith, switchMap, take, tap } from 'rxjs/operators';
+import { compareArraysUsingIds, paginatedRelationsToItems, relationsToItems } from '../../+item-page/simple/item-types/shared/item-relationships-utils';
 import { AppState, keySelector } from '../../app.reducer';
 import { hasValue, hasValueOperator, isNotEmpty, isNotEmptyOperator } from '../../shared/empty.util';
 import { ReorderableRelationship } from '../../shared/form/builder/ds-dynamic-form-ui/existing-metadata-list-element/existing-metadata-list-element.component';
-import {
-  RemoveNameVariantAction,
-  SetNameVariantAction
-} from '../../shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/name-variant.actions';
+import { RemoveNameVariantAction, SetNameVariantAction } from '../../shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/name-variant.actions';
 import { NameVariantListState } from '../../shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/name-variant.reducer';
 import { NotificationsService } from '../../shared/notifications/notifications.service';
 import { followLink, FollowLinkConfig } from '../../shared/utils/follow-link-config.model';
@@ -41,26 +24,14 @@ import { RelationshipType } from '../shared/item-relationships/relationship-type
 import { Relationship } from '../shared/item-relationships/relationship.model';
 import { RELATIONSHIP } from '../shared/item-relationships/relationship.resource-type';
 import { Item } from '../shared/item.model';
-import {
-  configureRequest, getFirstSucceededRemoteDataPayload,
-  getRemoteDataPayload,
-  getResponseFromEntry,
-  getSucceededRemoteData, getPaginatedListPayload
-} from '../shared/operators';
+import { configureRequest, getFirstSucceededRemoteDataPayload, getRemoteDataPayload, getResponseFromEntry, getSucceededRemoteData } from '../shared/operators';
 import { DataService } from './data.service';
 import { DefaultChangeAnalyzer } from './default-change-analyzer.service';
 import { ItemDataService } from './item-data.service';
 import { PaginatedList } from './paginated-list';
 import { RemoteData, RemoteDataState } from './remote-data';
-import {
-  DeleteRequest,
-  FindListOptions,
-  PostRequest,
-  RestRequest,
-  FindByIDRequest
-} from './request.models';
+import { DeleteRequest, FindListOptions, PostRequest, RestRequest } from './request.models';
 import { RequestService } from './request.service';
-import has = Reflect.has;
 
 const relationshipListsStateSelector = (state: AppState) => state.relationshipLists;
 
diff --git a/src/app/shared/form/builder/ds-dynamic-form-ui/ds-dynamic-form-control-container.component.ts b/src/app/shared/form/builder/ds-dynamic-form-ui/ds-dynamic-form-control-container.component.ts
index a55981786e..a968a3d7c7 100644
--- a/src/app/shared/form/builder/ds-dynamic-form-ui/ds-dynamic-form-control-container.component.ts
+++ b/src/app/shared/form/builder/ds-dynamic-form-ui/ds-dynamic-form-control-container.component.ts
@@ -17,7 +17,7 @@ import {
   ViewChild,
   ViewContainerRef
 } from '@angular/core';
-import { FormGroup, FormArray } from '@angular/forms';
+import { FormArray, FormGroup } from '@angular/forms';
 
 import {
   DYNAMIC_FORM_CONTROL_TYPE_ARRAY,
@@ -30,15 +30,20 @@ import {
   DYNAMIC_FORM_CONTROL_TYPE_SELECT,
   DYNAMIC_FORM_CONTROL_TYPE_TEXTAREA,
   DYNAMIC_FORM_CONTROL_TYPE_TIMEPICKER,
-  DynamicDatePickerModel, DynamicFormComponentService,
+  DynamicDatePickerModel,
+  DynamicFormArrayGroupModel,
+  DynamicFormArrayModel,
+  DynamicFormComponentService,
   DynamicFormControl,
   DynamicFormControlContainerComponent,
-  DynamicFormControlEvent, DynamicFormControlEventType,
+  DynamicFormControlEvent,
+  DynamicFormControlEventType,
   DynamicFormControlModel,
   DynamicFormLayout,
-  DynamicFormLayoutService, DynamicFormRelationService,
+  DynamicFormLayoutService,
+  DynamicFormRelationService,
   DynamicFormValidationService,
-  DynamicTemplateDirective, DynamicFormArrayGroupModel, DynamicFormArrayModel,
+  DynamicTemplateDirective,
 } from '@ng-dynamic-forms/core';
 import {
   DynamicNGBootstrapCalendarComponent,
@@ -60,7 +65,7 @@ import { DYNAMIC_FORM_CONTROL_TYPE_DSDATEPICKER } from './models/date-picker/dat
 import { DYNAMIC_FORM_CONTROL_TYPE_LOOKUP } from './models/lookup/dynamic-lookup.model';
 import { DynamicListCheckboxGroupModel } from './models/list/dynamic-list-checkbox-group.model';
 import { DynamicListRadioGroupModel } from './models/list/dynamic-list-radio-group.model';
-import { hasNoValue, hasValue, isEmpty, isNotEmpty, isNotUndefined } from '../../../empty.util';
+import { hasNoValue, hasValue, isNotEmpty, isNotUndefined } from '../../../empty.util';
 import { DYNAMIC_FORM_CONTROL_TYPE_LOOKUP_NAME } from './models/lookup/dynamic-lookup-name.model';
 import { DsDynamicTagComponent } from './models/tag/dynamic-tag.component';
 import { DsDatePickerComponent } from './models/date-picker/date-picker.component';
@@ -75,7 +80,7 @@ import { DYNAMIC_FORM_CONTROL_TYPE_RELATION_GROUP } from './models/relation-grou
 import { DsDatePickerInlineComponent } from './models/date-picker-inline/dynamic-date-picker-inline.component';
 import { DYNAMIC_FORM_CONTROL_TYPE_CUSTOM_SWITCH } from './models/custom-switch/custom-switch.model';
 import { CustomSwitchComponent } from './models/custom-switch/custom-switch.component';
-import { map, startWith, switchMap, find, take, tap } from 'rxjs/operators';
+import { find, map, startWith, switchMap, take } from 'rxjs/operators';
 import { combineLatest as observableCombineLatest, Observable, Subscription } from 'rxjs';
 import { SearchResult } from '../../../search/search-result.model';
 import { DSpaceObject } from '../../../../core/shared/dspace-object.model';
@@ -85,12 +90,7 @@ import { SelectableListService } from '../../../object-list/selectable-list/sele
 import { DsDynamicDisabledComponent } from './models/disabled/dynamic-disabled.component';
 import { DYNAMIC_FORM_CONTROL_TYPE_DISABLED } from './models/disabled/dynamic-disabled.model';
 import { DsDynamicLookupRelationModalComponent } from './relation-lookup-modal/dynamic-lookup-relation-modal.component';
-import {
-  getAllSucceededRemoteData,
-  getRemoteDataPayload,
-  getSucceededRemoteData,
-  getAllSucceededRemoteDataPayload, getPaginatedListPayload, getFirstSucceededRemoteDataPayload
-} from '../../../../core/shared/operators';
+import { getAllSucceededRemoteData, getFirstSucceededRemoteDataPayload, getPaginatedListPayload, getRemoteDataPayload, getSucceededRemoteData } from '../../../../core/shared/operators';
 import { RemoteData } from '../../../../core/data/remote-data';
 import { Item } from '../../../../core/shared/item.model';
 import { ItemDataService } from '../../../../core/data/item-data.service';
@@ -110,8 +110,6 @@ import { followLink } from '../../../utils/follow-link-config.model';
 import { paginatedRelationsToItems } from '../../../../+item-page/simple/item-types/shared/item-relationships-utils';
 import { RelationshipOptions } from '../models/relationship-options.model';
 import { FormBuilderService } from '../form-builder.service';
-import { modalConfigDefaults } from 'ngx-bootstrap/modal/modal-options.class';
-import { models } from '../../../../core/core.module';
 
 export function dsDynamicFormControlMapFn(model: DynamicFormControlModel): Type<DynamicFormControl> | null {
   switch (model.type) {
diff --git a/src/app/shared/form/builder/ds-dynamic-form-ui/existing-relation-list-element/existing-relation-list-element.component.ts b/src/app/shared/form/builder/ds-dynamic-form-ui/existing-relation-list-element/existing-relation-list-element.component.ts
index 5bab5896c0..65b3730773 100644
--- a/src/app/shared/form/builder/ds-dynamic-form-ui/existing-relation-list-element/existing-relation-list-element.component.ts
+++ b/src/app/shared/form/builder/ds-dynamic-form-ui/existing-relation-list-element/existing-relation-list-element.component.ts
@@ -1,16 +1,6 @@
-import {
-  Component,
-  Input,
-  OnChanges,
-  OnDestroy,
-  OnInit,
-  Output,
-  EventEmitter
-} from '@angular/core';
-import { FormControl } from '@angular/forms';
-import { DynamicFormArrayGroupModel } from '@ng-dynamic-forms/core';
+import { Component, EventEmitter, Input, OnChanges, OnDestroy, OnInit, Output } from '@angular/core';
 import { Store } from '@ngrx/store';
-import { Observable, of as observableOf, Subscription, BehaviorSubject } from 'rxjs';
+import { BehaviorSubject, Observable, Subscription } from 'rxjs';
 import { filter } from 'rxjs/operators';
 import { AppState } from '../../../../../app.reducer';
 import { Item } from '../../../../../core/shared/item.model';
@@ -18,15 +8,10 @@ import { getAllSucceededRemoteData, getRemoteDataPayload } from '../../../../../
 import { hasValue, isNotEmpty } from '../../../../empty.util';
 import { ItemSearchResult } from '../../../../object-collection/shared/item-search-result.model';
 import { SelectableListService } from '../../../../object-list/selectable-list/selectable-list.service';
-import { FormFieldMetadataValueObject } from '../../models/form-field-metadata-value.model';
 import { RelationshipOptions } from '../../models/relationship-options.model';
-import { DynamicConcatModel } from '../models/ds-dynamic-concat.model';
 import { RemoveRelationshipAction } from '../relation-lookup-modal/relationship.actions';
 import { ViewMode } from '../../../../../core/shared/view-mode.model';
 import { ReorderableRelationship } from '../existing-metadata-list-element/existing-metadata-list-element.component';
-import {
-  SaveSubmissionFormAction
-} from '../../../../../submission/objects/submission-objects.actions';
 
 // tslint:disable:max-classes-per-file
 /**
diff --git a/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/relationship.effects.ts b/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/relationship.effects.ts
index d69935d91c..c43d229ac4 100644
--- a/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/relationship.effects.ts
+++ b/src/app/shared/form/builder/ds-dynamic-form-ui/relation-lookup-modal/relationship.effects.ts
@@ -1,12 +1,12 @@
 import { Injectable } from '@angular/core';
 import { Actions, Effect, ofType } from '@ngrx/effects';
-import { debounceTime, filter, map, mergeMap, switchMap, take, tap } from 'rxjs/operators';
+import { debounceTime, filter, map, mergeMap, switchMap, take } from 'rxjs/operators';
 import { BehaviorSubject, combineLatest, Observable } from 'rxjs';
 import { RelationshipService } from '../../../../../core/data/relationship.service';
 import { getRemoteDataPayload, getSucceededRemoteData } from '../../../../../core/shared/operators';
 import { AddRelationshipAction, RelationshipAction, RelationshipActionTypes, UpdateRelationshipAction, UpdateRelationshipNameVariantAction } from './relationship.actions';
 import { Item } from '../../../../../core/shared/item.model';
-import { hasNoValue, hasValue, hasValueOperator } from '../../../../empty.util';
+import { hasNoValue, hasValue } from '../../../../empty.util';
 import { Relationship } from '../../../../../core/shared/item-relationships/relationship.model';
 import { RelationshipType } from '../../../../../core/shared/item-relationships/relationship-type.model';
 import { RelationshipTypeService } from '../../../../../core/data/relationship-type.service';
@@ -18,7 +18,7 @@ import { Store } from '@ngrx/store';
 import { ObjectCacheService } from '../../../../../core/cache/object-cache.service';
 import { RequestService } from '../../../../../core/data/request.service';
 import { ServerSyncBufferActionTypes } from '../../../../../core/cache/server-sync-buffer.actions';
-import { CommitPatchOperationsAction, JsonPatchOperationsActionTypes, PatchOperationsActions } from '../../../../../core/json-patch/json-patch-operations.actions';
+import { JsonPatchOperationsActionTypes } from '../../../../../core/json-patch/json-patch-operations.actions';
 import { followLink } from '../../../../utils/follow-link-config.model';
 import { RemoteData } from '../../../../../core/data/remote-data';
 
diff --git a/src/app/shared/form/builder/parsers/field-parser.ts b/src/app/shared/form/builder/parsers/field-parser.ts
index fe670fbca2..6fafe9cbc1 100644
--- a/src/app/shared/form/builder/parsers/field-parser.ts
+++ b/src/app/shared/form/builder/parsers/field-parser.ts
@@ -58,7 +58,6 @@ export abstract class FieldParser {
         hasSelectableMetadata: isNotEmpty(this.configData.selectableMetadata),
         groupFactory: () => {
           let model;
-          let isFirstModelInArray = true;
           if ((arrayCounter === 0)) {
             model = this.modelFactory();
             arrayCounter++;
@@ -70,7 +69,6 @@ export abstract class FieldParser {
                 fieldValue = '';
               } else {
                 fieldValue = this.getInitFieldValue(arrayCounter - 1, fieldArrayCounter - 1);
-                isFirstModelInArray = false;
               }
               fieldArrayCounter++;
               if (fieldArrayCounter === fieldArrayOfValueLength + 1) {
diff --git a/src/app/shared/form/form.component.ts b/src/app/shared/form/form.component.ts
index 0cce0ee9a8..dee06c29b2 100644
--- a/src/app/shared/form/form.component.ts
+++ b/src/app/shared/form/form.component.ts
@@ -1,22 +1,8 @@
 import { distinctUntilChanged, filter, map } from 'rxjs/operators';
-import {
-  ChangeDetectorRef,
-  Component,
-  EventEmitter,
-  Input,
-  OnDestroy,
-  OnInit,
-  Output
-} from '@angular/core';
+import { ChangeDetectorRef, Component, EventEmitter, Input, OnDestroy, OnInit, Output } from '@angular/core';
 import { AbstractControl, FormArray, FormControl, FormGroup } from '@angular/forms';
 
-import {
-  DynamicFormArrayModel,
-  DynamicFormControlEvent,
-  DynamicFormControlModel,
-  DynamicFormGroupModel,
-  DynamicFormLayout, DYNAMIC_FORM_CONTROL_TYPE_GROUP,
-} from '@ng-dynamic-forms/core';
+import { DynamicFormArrayModel, DynamicFormControlEvent, DynamicFormControlModel, DynamicFormGroupModel, DynamicFormLayout, } from '@ng-dynamic-forms/core';
 import { findIndex } from 'lodash';
 import { FormBuilderService } from './builder/form-builder.service';
 import { Observable, Subscription } from 'rxjs';
@@ -24,10 +10,7 @@ import { hasValue, isNotEmpty, isNotNull, isNull } from '../empty.util';
 import { FormService } from './form.service';
 import { FormEntry, FormError } from './form.reducer';
 import { DYNAMIC_FORM_CONTROL_TYPE_SCROLLABLE_DROPDOWN } from './builder/ds-dynamic-form-ui/models/scrollable-dropdown/dynamic-scrollable-dropdown.model';
-import {
-  QUALDROP_GROUP_SUFFIX,
-  QUALDROP_VALUE_SUFFIX
-} from './builder/ds-dynamic-form-ui/models/ds-dynamic-qualdrop.model';
+import { QUALDROP_GROUP_SUFFIX } from './builder/ds-dynamic-form-ui/models/ds-dynamic-qualdrop.model';
 
 const QUALDROP_GROUP_REGEX = new RegExp(`${QUALDROP_GROUP_SUFFIX}_\\d+$`);