diff --git a/IPython/html/static/notebook/js/textcell.js b/IPython/html/static/notebook/js/textcell.js
index 4ae3135..bdfa0bd 100644
--- a/IPython/html/static/notebook/js/textcell.js
+++ b/IPython/html/static/notebook/js/textcell.js
@@ -422,39 +422,6 @@ var IPython = (function (IPython) {
};
- /** @method handle_codemirror_keyevent **/
- RawCell.prototype.handle_codemirror_keyevent = function (editor, event) {
-
- var that = this;
- if (this.mode === 'command') {
- return false
- } else if (this.mode === 'edit') {
- // TODO: review these handlers...
- if (event.which === key.UPARROW && event.type === 'keydown') {
- // If we are not at the top, let CM handle the up arrow and
- // prevent the global keydown handler from handling it.
- if (!that.at_top()) {
- event.stop();
- return false;
- } else {
- return true;
- };
- } else if (event.which === key.DOWNARROW && event.type === 'keydown') {
- // If we are not at the bottom, let CM handle the down arrow and
- // prevent the global keydown handler from handling it.
- if (!that.at_bottom()) {
- event.stop();
- return false;
- } else {
- return true;
- };
- };
- return false;
- };
- return false;
- };
-
-
/**
* @class HeadingCell
* @extends IPython.TextCell