android: Remove unused AccessibilityUtil

chrome/browser/android/accessibility_util.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "base/android/context_utils.h"
-#include "base/android/jni_android.h"
-#include "chrome/browser/android/accessibility_util.h"
-#include "jni/AccessibilityUtil_jni.h"
-
-namespace chrome {
-namespace android {
-
-bool AccessibilityUtil::IsAccessibilityEnabled() {
-  return Java_AccessibilityUtil_isAccessibilityEnabled(
-      base::android::AttachCurrentThread(),
-      base::android::GetApplicationContext());
-}
-
-AccessibilityUtil::AccessibilityUtil() { }
-
-}  // namespace android
-}  // namespace chrome