jqLiteOff doesn't remove event handler from DOM correcly, which affects Safari on iOS

[Peng-Peng]

https://github.com/angular/angular.js/blob/master/src/jqLite.js#L287
jqLiteOff doesn't remove registered event listener from DOM, this affects the behavior of element in Safari on iOS as some event bubbling in Safari depends on whether an element has mouse event handler or not. Please refer to http://www.quirksmode.org/blog/archives/2014/02/mouse_event_bub.html