Properly remove empty leftover folders after rename

TorrentInfo::origFilePath will return the very original path from
.torrent file, not the most recent file path before the rename operation
and thus the code would not be working as we expected.

src/gui/torrentcontenttreeview.cpp

@@ -204,15 +204,6 @@ void TorrentContentTreeView::renameSelectedFile(BitTorrent::TorrentHandle *torre
         if (needForceRecheck)
             torrent->forceRecheck();
 
-        // Remove old folder
-        const QString oldFullPath = torrent->savePath(true) + oldPath;
-        int timeout = 10;
-        while (!QDir().rmpath(oldFullPath) && (timeout > 0)) {
-            // FIXME: We should not sleep here (freezes the UI for 1 second)
-            QThread::msleep(100);
-            --timeout;
-        }
-
         model->setData(modelIndex, newName);
     }
 }