Fix loading indicator

src-ui/src/app/components/document-detail/document-detail.component.ts

@@ -157,7 +157,6 @@ export class DocumentDetailComponent
   previewCurrentPage: number = 1
   previewNumPages: number = 1
   previewZoomSetting: ZoomSetting = ZoomSetting.Width
-  previewLoading: boolean = true
 
   printLoadingModal: NgbModalRef
 
@@ -451,8 +450,6 @@ export class DocumentDetailComponent
       .subscribe({
         next: (result) => {
           this.metadata = result
-          if (this.getContentType() !== 'application/pdf')
-            this.previewLoading = false
         },
         error: (error) => {
           this.metadata = null
@@ -774,10 +771,6 @@ export class DocumentDetailComponent
       })
   }
 
-  onPdfLoadingStarts() {
-    this.previewLoading = false
-  }
-
   onPagesLoaded(event: PagesLoadedEvent) {
     this.previewNumPages = event.pagesCount
   }