FileActivity: don't try to get file from FileDetailSharingFragment

This solves some bugs with toolbar title.

Signed-off-by: Álvaro Brey Vilas <alvaro.brey@nextcloud.com>

src/main/java/com/owncloud/android/ui/activity/FileActivity.java

@@ -291,10 +291,6 @@ public abstract class FileActivity extends DrawerActivity
      * @return  Main {@link OCFile} handled by the activity.
      */
     public OCFile getFile() {
-        FileDetailSharingFragment fragment = getShareFileFragment();
-        if (fragment != null) {
-            return fragment.getFile();
-        }
         return mFile;
     }
 

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

@@ -458,10 +458,6 @@ public class FileDetailSharingFragment extends Fragment implements ShareeListAda
         searchView.setQuery(query, true);
     }
 
-    public OCFile getFile() {
-        return file;
-    }
-
     @Override
     public void advancedPermissions(OCShare share) {
         modifyExistingShare(share, FileDetailsSharingProcessFragment.SCREEN_TYPE_PERMISSION);