folder: remove broken call

Signed-off-by: Varun Patil <radialapps@gmail.com>

src/components/frame/Folder.vue

@@ -17,11 +17,7 @@
     <div class="previews fill-block">
       <div class="preview-container fill-block">
         <div class="img-outer" v-for="info of previews" :key="info.fileid">
-          <XImg
-            class="ximg fill-block"
-            :src="getPreviewUrl(info, true, 256)"
-            @error="$event.target.classList.add('error')"
-          />
+          <XImg class="ximg fill-block" :src="getPreviewUrl(info, true, 256)" />
         </div>
       </div>
     </div>