diff --git a/dspace-api/src/main/java/org/dspace/content/CollectionServiceImpl.java b/dspace-api/src/main/java/org/dspace/content/CollectionServiceImpl.java
index 652d2a5f38..68dae739ef 100644
--- a/dspace-api/src/main/java/org/dspace/content/CollectionServiceImpl.java
+++ b/dspace-api/src/main/java/org/dspace/content/CollectionServiceImpl.java
@@ -1109,26 +1109,6 @@ public class CollectionServiceImpl extends DSpaceObjectServiceImpl<Collection> i
         return (int) resp.getTotalSearchResults();
     }
 
-    @Override
-    @SuppressWarnings("rawtypes")
-    public List<Collection> findAllCollectionsByEntityType(Context context, String entityType)
-            throws SearchServiceException {
-        List<Collection> collectionList = new ArrayList<>();
-
-        DiscoverQuery discoverQuery = new DiscoverQuery();
-        discoverQuery.setDSpaceObjectFilter(IndexableCollection.TYPE);
-        discoverQuery.addFilterQueries("dspace.entity.type:" + entityType);
-
-        DiscoverResult discoverResult = searchService.search(context, discoverQuery);
-        List<IndexableObject> solrIndexableObjects = discoverResult.getIndexableObjects();
-
-        for (IndexableObject solrCollection : solrIndexableObjects) {
-            Collection c = ((IndexableCollection) solrCollection).getIndexedObject();
-            collectionList.add(c);
-        }
-        return collectionList;
-    }
-
     /**
      * Returns total collection archived items
      *
diff --git a/dspace-api/src/main/java/org/dspace/content/service/CollectionService.java b/dspace-api/src/main/java/org/dspace/content/service/CollectionService.java
index 0a56105ead..738e06fac2 100644
--- a/dspace-api/src/main/java/org/dspace/content/service/CollectionService.java
+++ b/dspace-api/src/main/java/org/dspace/content/service/CollectionService.java
@@ -484,21 +484,6 @@ public interface CollectionService
     public int countCollectionsWithSubmit(String q, Context context, Community community, String entityType)
         throws SQLException, SearchServiceException;
 
-    /**
-     * Returns a list of all collections for a specific entity type.
-     * NOTE: for better performance, this method retrieves its results from an index (cache)
-     *       and does not query the database directly.
-     *       This means that results may be stale or outdated until
-     *       https://github.com/DSpace/DSpace/issues/2853 is resolved."
-     *
-     * @param context          DSpace Context
-     * @param entityType       limit the returned collection to those related to given entity type
-     * @return                 list of collections found
-     * @throws SearchServiceException    if search error
-     */
-    public List<Collection> findAllCollectionsByEntityType(Context context, String entityType)
-        throws SearchServiceException;
-
     /**
      * Returns total collection archived items
      *