Revert of Check for already existing entry when adding to SiteProcessMap.

chrome/test/data/extensions/web_request_site_process_registration/test.js

Index: chrome/test/data/extensions/web_request_site_process_registration/test.js
diff --git a/chrome/test/data/extensions/web_request_site_process_registration/test.js b/chrome/test/data/extensions/web_request_site_process_registration/test.js
deleted file mode 100644
index a7f5d61ec5ac02a6abd6e22587f3006b7a37b26e..0000000000000000000000000000000000000000
--- a/chrome/test/data/extensions/web_request_site_process_registration/test.js
+++ /dev/null
@@ -1,13 +0,0 @@
-// Copyright 2017 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.
-
-chrome.webRequest.onBeforeRequest.addListener(
-  function(details) {
-    if (details.url == chrome.extension.getURL("/blocked.html")) {
-      return {cancel: true};
-    }
-  },
-  {urls: ["<all_urls>"]},
-  ["blocking"]
-);