diff --git a/IPython/html/services/contents/clientsidenbmanager.py b/IPython/html/services/contents/clientsidenbmanager.py
deleted file mode 100644
index b1c8dcc..0000000
--- a/IPython/html/services/contents/clientsidenbmanager.py
+++ /dev/null
@@ -1,23 +0,0 @@
-"""A dummy contents manager for when the logic is done client side (in JavaScript)."""
-
-# Copyright (c) IPython Development Team.
-# Distributed under the terms of the Modified BSD License.
-
-from .manager import ContentsManager
-
-class ClientSideContentsManager(ContentsManager):
-    """Dummy contents manager for use with client-side contents APIs like GDrive
-
-    The view handlers for notebooks and directories (/tree/) check with the
-    ContentsManager that their target exists so they can return 404 if not. Using
-    this class as the contents manager allows those pages to render without
-    checking something that the server doesn't know about.
-    """
-    def dir_exists(self, path):
-        return True
-
-    def is_hidden(self, path):
-        return False
-
-    def file_exists(self, name, path=''):
-        return True