shared module should not provide singletons

src/app/shared/shared.module.ts

@@ -1,4 +1,4 @@
-import { NgModule, ModuleWithProviders } from '@angular/core';
+import { NgModule } from '@angular/core';
 import { CommonModule } from '@angular/common';
 import { RouterModule } from '@angular/router';
 import { FormsModule, ReactiveFormsModule } from '@angular/forms';
@@ -79,12 +79,5 @@ const PROVIDERS = [
   ]
 })
 export class SharedModule {
-  static forRoot(): ModuleWithProviders {
-    return {
-      ngModule: SharedModule,
-      providers: [
-        ...PROVIDERS
-      ]
-    };
-  }
+
 }