Remove service worker concepts from _api_features.json

extensions/common/features/api_feature.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 "extensions/common/features/api_feature.h"
 
 namespace extensions {
 
 APIFeature::APIFeature()
-    : internal_(false), blocked_in_service_worker_(false) {}
+    : internal_(false) {}
 
 APIFeature::~APIFeature() {
 }
 
 bool APIFeature::IsInternal() const {
   return internal_;
 }
 
-bool APIFeature::IsBlockedInServiceWorker() const {
-  return blocked_in_service_worker_;
-}
-
 std::string APIFeature::Parse(const base::DictionaryValue* value) {
   std::string error = SimpleFeature::Parse(value);
   if (!error.empty())
     return error;
 
   value->GetBoolean("internal", &internal_);
-  value->GetBoolean("blocked_in_service_worker", &blocked_in_service_worker_);
 
   if (contexts()->empty())
     return name() + ": API features must specify at least one context.";
 
   return std::string();
 }
 
 }  // namespace extensions