remove dependencies to namespace in Completer

notebook/static/base/js/namespace.js

@@ -58,6 +58,7 @@ define(function(){
     jglobal('Cell','base/js/cell');
     jglobal('OutputArea','notebook/js/outputarea');
     jglobal('KeyboardManager','notebook/js/keyboardmanager');
+    jglobal('Completer','notebook/js/completer');
 
     Jupyter.version = "4.0.0.dev";
     Jupyter._target = '_blank';

notebook/static/notebook/js/completer.js

@@ -2,13 +2,12 @@
 // Distributed under the terms of the Modified BSD License.
 
 define([
-    'base/js/namespace',
     'jquery',
     'base/js/utils',
     'base/js/keyboard',
     'notebook/js/contexthint',
     'codemirror/lib/codemirror',
-], function(IPython, $, utils, keyboard, CodeMirror) {
+], function($, utils, keyboard, CodeMirror) {
     "use strict";
 
     // easier key mapping
@@ -409,8 +408,5 @@ define([
         }, 50);
     };
 
-    // For backwards compatability.
-    IPython.Completer = Completer;
-
     return {'Completer': Completer};
 });