Remove content/public/plugin and chrome/plugin

chrome/plugin/BUILD.gn

Index: chrome/plugin/BUILD.gn
diff --git a/chrome/plugin/BUILD.gn b/chrome/plugin/BUILD.gn
deleted file mode 100644
index 39d260236998965787b4b92469b975db4c15d527..0000000000000000000000000000000000000000
--- a/chrome/plugin/BUILD.gn
+++ /dev/null
@@ -1,22 +0,0 @@
-# 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.
-
-static_library("plugin") {
-  sources = [
-    "chrome_content_plugin_client.cc",
-    "chrome_content_plugin_client.h",
-  ]
-
-  configs += [
-    "//build/config/compiler:wexit_time_destructors",
-    "//v8:external_startup_data",
-  ]
-
-  deps = [
-    "//base",
-    "//chrome:strings",
-    "//content/public/plugin",
-    "//gin",
-  ]
-}