fix: dataset image url update

Author: ChengShi-1

test/integration/collections/CollectionsRepository.test.ts

@@ -399,7 +399,6 @@ describe('CollectionsRepository', () => {
       )
       expect(actualDatasetPreview.parentCollectionName).toBe(expectedCollectionsName)
       expect(actualDatasetPreview.type).toBe(CollectionItemType.DATASET)
-      expect(actualDatasetPreview.imageUrl).toBe('http://dataverse.com')
 
       expect(actualCollectionPreview.name).toBe(expectedCollectionsName)
       expect(actualCollectionPreview.alias).toBe(testSubCollectionAlias)

test/testHelpers/TestConstants.ts

@@ -89,8 +89,7 @@ export class TestConstants {
               dsDescriptionValue: 'This is the description of the dataset.'
             }
           ],
-          subject: ['Medicine, Health and Life Sciences'],
-          imageUrl: 'http://dataverse.com'
+          subject: ['Medicine, Health and Life Sciences']
         }
       }
     ]