revert this, although it will get removed by a different PR

src/main/java/com/owncloud/android/ui/fragment/OCFileListFragment.java

@@ -250,6 +250,10 @@ public class OCFileListFragment extends ExtendedListFragment implements OCFileLi
     public void onResume() {
         super.onResume();
 
+        if (remoteOperationAsyncTask != null) {
+            remoteOperationAsyncTask.cancel(true);
+        }
+
         if (getActivity() != null) {
             AnalyticsUtils.setCurrentScreenName(getActivity(), SCREEN_NAME, TAG);
         }