Disable hot corner in gnome 3

This method could complete stop the hot corner function. Edit layout.js and set "reactive" to false.

/usr/share/gnome-shell/js/ui/layout.js

this._corner = new Clutter.Rectangle({ name: 'hot-corner',
                                       width: 1,
                                       height: 1,
                                       opacity: 0,
                                       reactive: false });icon-size: 48px;
 }