[Extensions] Clean up renderer channel-related code

chrome/common/extensions/features/feature_util.cc

Index: chrome/common/extensions/features/feature_util.cc
diff --git a/chrome/common/extensions/features/feature_util.cc b/chrome/common/extensions/features/feature_util.cc
deleted file mode 100644
index b0c6b494cc15761caefd2294ec972221b98d9d05..0000000000000000000000000000000000000000
--- a/chrome/common/extensions/features/feature_util.cc
+++ /dev/null
@@ -1,18 +0,0 @@
-// Copyright 2015 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 "chrome/common/extensions/features/feature_util.h"
-
-#include "components/version_info/version_info.h"
-#include "extensions/common/features/feature_channel.h"
-
-namespace extensions {
-namespace feature_util {
-
-bool ExtensionServiceWorkersEnabled() {
-  return true;
-}
-
-}  // namespace feature_util
-}  // namespace extensions