fixed destroy

lib/network/Network.js

@@ -841,17 +841,17 @@ Network.prototype._createKeyBinds = function() {
   }
 };
 
-
+/**
+ * Cleans up all bindings of the network, removing it fully from the memory IF the variable is set to null after calling this function.
+ * var network = new vis.Network(..);
+ * network.destroy();
+ * network = null;
+ */
 Network.prototype.destroy = function() {
   this.start = function () {};
   this.redraw = function () {};
   this.timer = false;
 
-  setTimeout(this._destroy.bind(this), 10);
-}
-
-Network.prototype._destroy = function() {
-
   // remove keybindings
   this.keycharm.reset();