[DURACOM-426] remove unused method and duplicated config example

Author: FrancescoMolinaro

config/config.example.yml

@@ -730,8 +730,3 @@ identifierSubtypes:
     iconPosition: IdentifierSubtypesIconPositionEnum.LEFT
     link: https://ror.org
 
-# When the search results are retrieved, for each item type the metadata with a valid authority value are inspected.
-# Referenced items will be fetched with a find all by id strategy to avoid individual rest requests to efficiently display the search results.
-followAuthorityMetadata:
-  - type: Publication
-    metadata: dc.contributor.author

src/app/core/data/external-source-data.service.ts

@@ -66,17 +66,6 @@ export class ExternalSourceDataService extends IdentifiableDataService<ExternalS
     );
   }
 
-  /**
-   * Get the endpoint for an external source's entryValues by given entry id
-   * @param externalSourceId  The id of the external source to fetch entry for
-   * @param entryId           The id of the external source entry to retrieve
-   */
-  getEntryIDHref(externalSourceId: string, entryId: string): Observable<string> {
-    return this.getBrowseEndpoint().pipe(
-      map((href) => href + '/' + externalSourceId + '/entryValues/' + entryId),
-    );
-  }
-
   /**
    * Get the entries for an external source
    * @param externalSourceId            The id of the external source to fetch entries for