diff --git a/AppKit/CPWindow/CPWindow.j b/AppKit/CPWindow/CPWindow.j
index 87b2b4687..f118368e3 100644
--- a/AppKit/CPWindow/CPWindow.j
+++ b/AppKit/CPWindow/CPWindow.j
@@ -2354,49 +2354,6 @@ CPTexturedBackgroundWindowMask
     }
 }
 
-/*
-    @ignore
-    Interprets the key event for action messages and sends the action message down the responder chain
-    Cocoa only sends moveDown:, moveUp:, moveLeft:, moveRight:, pageUp:, pageDown: and complete: messages.
-    We deviate from this by sending (the default) scrollPageUp: scrollPageDown: for pageUp and pageDown keys.
-    @param anEvent the event to handle. 
-    @return YES if the key event was handled, NO if no responder handled the key event
-*/
-- (BOOL)_processKeyboardUIKey:(CPEvent)anEvent
-{
-    var character = [anEvent charactersIgnoringModifiers],
-        uiKeys = [
-            CPLeftArrowFunctionKey,
-            CPRightArrowFunctionKey,
-            CPUpArrowFunctionKey,
-            CPDownArrowFunctionKey,
-            CPPageUpFunctionKey,
-            CPPageDownFunctionKey,
-            CPEscapeFunctionKey
-        ];
-
-    if (![uiKeys containsObject:character])
-        return NO;
-
-    var selectors = [CPKeyBinding selectorsForKey:character modifierFlags:0];
-
-    if ([selectors count] <= 0)
-        return NO;
-
-    if (character !== CPEscapeFunctionKey)
-    {
-        var selector = [selectors objectAtIndex:0];
-        return [[self firstResponder] tryToPerform:selector with:self];
-    }
-    else
-    {
-        // Cocoa sends complete: for the escape key (in stead of the default cancelOperation:)
-        // This is also the only action that is not sent directly to the first responder, but through doCommandBySelector.
-        // The difference is that doCommandBySelector: will also send the action to the window and application delegates.
-        [[self firstResponder] doCommandBySelector:@selector(complete:)];
-    }
-}
-
 - (void)_dirtyKeyViewLoop
 {
     if (_autorecalculatesKeyViewLoop)