shellEntry: Remove close method

GrabHelper already takes care of putting the key focus back on the
widget that had it when the grab was established.

ShellEntry's close() has recently become harmful since it's now called
from the menu's destroy() method and that is called in the entry's
destroy handler which means that this._entry might no longer be valid
at close() time.

https://bugzilla.gnome.org/show_bug.cgi?id=697560

js/ui/shellEntry.js

@@ -82,11 +82,6 @@ const EntryMenu = new Lang.Class({
             this.actor.grab_key_focus();
     },
 
-    close: function(animate) {
-        this._entry.grab_key_focus();
-        this.parent(animate);
-    },
-
     _updateCopyItem: function() {
         let selection = this._entry.clutter_text.get_selection();
         this._copyItem.setSensitive(!this._entry.clutter_text.password_char &&