Remove list directory from storage driver

storage/cloud.py

@@ -210,27 +210,6 @@ class _CloudStorage(BaseStorageV2):
       mp.complete_upload()
     return total_bytes_written, error
 
-  def list_directory(self, path=None):
-    self._initialize_cloud_conn()
-    path = self._init_path(path)
-    if not path.endswith('/'):
-      path += '/'
-    ln = 0
-    if self._root_path != '/':
-      ln = len(self._root_path)
-    exists = False
-    for key in self._cloud_bucket.list(prefix=path, delimiter='/'):
-      exists = True
-      name = key.name
-      if name.endswith('/'):
-        yield name[ln:-1]
-      else:
-        yield name[ln:]
-    if exists is False:
-      # In order to be compliant with the LocalStorage API. Even though
-      # S3 does not have a concept of folders.
-      raise OSError('No such directory: \'{0}\''.format(path))
-
   def exists(self, path):
     self._initialize_cloud_conn()
     path = self._init_path(path)