Always use default item icon

src/utils/image.test.ts

@@ -68,11 +68,6 @@ describe('getItemTypeIcon()', () => {
         });
     });
 
-    it('Should return undefined for undefined type', () => {
-        expect(getItemTypeIcon(undefined, 'default'))
-            .toBeUndefined();
-    });
-
     it('Should return the default icon for unknown type if provided', () => {
         expect(getItemTypeIcon('foobar', 'default'))
             .toBe('default');

src/utils/image.ts

@@ -136,8 +136,6 @@ export function getItemTypeIcon(itemType: BaseItemKind | string | undefined, def
             return 'photo';
         case BaseItemKind.PhotoAlbum:
             return 'photo_album';
-        case undefined:
-            return;
         default:
             return defaultIcon;
     }