[WebView] Remove more redundant classes

android_webview/browser/aw_web_preferences_populater.cc

Index: android_webview/browser/aw_web_preferences_populater.cc
diff --git a/android_webview/browser/aw_web_preferences_populater.cc b/android_webview/browser/aw_web_preferences_populater.cc
deleted file mode 100644
index 008cf5cb761f2e6b7e5e1cb0be6359e24546fe7c..0000000000000000000000000000000000000000
--- a/android_webview/browser/aw_web_preferences_populater.cc
+++ /dev/null
@@ -1,11 +0,0 @@
-// Copyright 2013 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 "android_webview/browser/aw_web_preferences_populater.h"
-
-namespace android_webview {
-
-AwWebPreferencesPopulater::~AwWebPreferencesPopulater() {}
-
-}  // namespace android_webview