Deprecating navigator.app.overrideBackbutton

Everyone should be using:

    document.addEventListener("backbutton", yourCallbackFunction, false);

framework/assets/js/app.js

@@ -75,19 +75,6 @@ App.prototype.backHistory = function() {
     PhoneGap.exec(null, null, "App", "backHistory", []);
 };
 
-/**
- * Override the default behavior of the Android back button.
- * If overridden, when the back button is pressed, the "backKeyDown" JavaScript event will be fired.
- *
- * Note: The user should not have to call this method.  Instead, when the user
- *       registers for the "backbutton" event, this is automatically done.
- *
- * @param override		T=override, F=cancel override
- */
-App.prototype.overrideBackbutton = function(override) {
-    PhoneGap.exec(null, null, "App", "overrideBackbutton", [override]);
-};
-
 /**
  * Exit and terminate the application.
  */