Remove duplicated headers from the testing/ directory

Source/testing/runner/WebAXObjectProxy.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 17 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "WebAXObjectProxy.h"
 
 #include "TestCommon.h"
 #include "public/platform/WebCString.h"
 #include "public/platform/WebPoint.h"
 #include "public/platform/WebRect.h"
 #include "public/platform/WebString.h"
-#include "public/web/WebAXObject.h"
 
 using namespace blink;
 using namespace std;
 
 namespace WebTestRunner {
 
 namespace {
 
 // Map role value to string, matching Safari/Mac platform implementation to
 // avoid rebaselining layout tests.
@@ skipping 1130 matching lines @@
 }
 
 WebAXObjectProxy* WebAXObjectProxyList::createRoot(const WebAXObject& object)
 {
     WebAXObjectProxy* element = new RootWebAXObjectProxy(object, this);
     m_elements.push_back(element);
     return element;
 }
 
 }