Devtools UI: Remove redundant tooltips

Source/devtools/front_end/components/DOMPresentationUtils.js

 /*
  * Copyright (C) 2011 Google Inc.  All rights reserved.
  * Copyright (C) 2007, 2008 Apple Inc.  All rights reserved.
  * Copyright (C) 2008 Matt Lilek <webkit@mattlilek.com>
  * Copyright (C) 2009 Joseph Pecoraro
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
@@ skipping 55 matching lines @@
                 var className = classes[i];
                 if (className && !(className in foundClasses)) {
                     var part = "." + className;
                     title += part;
                     classesElement.createTextChild(part);
                     foundClasses[className] = true;
                 }
             }
         }
     }
-    parentElement.title = title;
 }
 
 /**
  * @param {!Element} container
  * @param {string} nodeTitle
  */
 WebInspector.DOMPresentationUtils.createSpansForNodeTitle = function(container, nodeTitle)
 {
     var match = nodeTitle.match(/([^#.]+)(#[^.]+)?(\..*)?/);
     container.createChild("span", "webkit-html-tag-name").textContent = match[1];
@@ skipping 515 matching lines @@
 WebInspector.DOMNodePathStep.prototype = {
     /**
      * @override
      * @return {string}
      */
     toString: function()
     {
         return this.value;
     }
 }