Get rid of a console.trace and allow drops on the toolbox

core/toolbox.js

@@ -476,8 +476,6 @@ Blockly.Toolbox.TreeControl.prototype.enterDocument = function() {
     Blockly.bindEvent_(el, goog.events.EventType.TOUCHSTART, this,
         this.handleTouchEvent_);
   }
-
-  Blockly.bindEvent_(el, 'mouseup', this, Blockly.Touch.clearTouchIdentifier);
 };
 
 /**

core/touch.js

@@ -212,7 +212,6 @@ Blockly.Touch.checkTouchIdentifier = function(e) {
   if (e.type == 'mousedown' || e.type == 'touchstart') {
     // No identifier set yet, and this is the start of a drag.  Set it and
     // return.
-    console.trace('setting touch identfier');
     Blockly.Touch.touchIdentifier_ = identifier;
     return true;
   }