Devtools UI: Remove redundant tooltips

Source/devtools/front_end/elements/StylesSidebarPane.js

 /*
  * Copyright (C) 2007 Apple Inc.  All rights reserved.
  * 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 2242 matching lines @@
         this._expandElement.className = "expand-element";
 
         var propertyRenderer = new WebInspector.StylesSidebarPropertyRenderer(this._styleRule.rule(), this.node(), this.name, this.value);
         if (this.property.parsedOk) {
             propertyRenderer.setColorHandler(this._processColor.bind(this));
             propertyRenderer.setBezierHandler(this._processBezier.bind(this));
         }
 
         this.listItemElement.removeChildren();
         this.nameElement = propertyRenderer.renderName();
-        this.nameElement.title = this.property.propertyText;
         this.valueElement = propertyRenderer.renderValue();
         if (!this.treeOutline)
             return;
 
         var indent = WebInspector.moduleSetting("textEditorIndent").get();
         this.listItemElement.createChild("span", "styles-clipboard-only").createTextChild(indent + (this.property.disabled ? "/* " : ""));
         this.listItemElement.appendChild(this.nameElement);
         this.listItemElement.createTextChild(": ");
         this.listItemElement.appendChild(this._expandElement);
         this.listItemElement.appendChild(this.valueElement);
@@ skipping 952 matching lines @@
 
     /**
      * @override
      * @return {?WebInspector.ToolbarItem}
      */
     item: function()
     {
         return this._button;
     }
 }