CC-2882: Airtime cannot delete watched folder when is been renamed

- done

airtime_mvc/application/models/MusicDir.php

@@ -286,10 +286,6 @@ class MusicDir {
         $real_path = realpath($p_dir)."/";
         if($real_path != "/"){
             $p_dir = $real_path;
-        }else{
-            // this is the case where user removes watched directory on 
-            // the file system directly.
-            $p_dir .= "/";
         }
         $dir = MusicDir::getDirByPath($p_dir);
         if($dir == NULL){