Fix clean management script

Author: jochenklar

rdmo/core/management/commands/clean.py

@@ -24,7 +24,7 @@ def handle(self, *args, **options):
             self.remove_path('rdmo.egg-info')
 
         if options['command'] in ['all', 'git']:
-            subprocess.call(['git', 'clean', '-dfX'], cwd='rdmo')
+            subprocess.call(['git', 'clean', '-dfx'], cwd='rdmo')
 
         if options['command'] in ['all', 'media']:
             self.remove_path(settings.MEDIA_ROOT)