Remove CRWWebControllerProvider

ios/public/provider/web/BUILD.gn

Index: ios/public/provider/web/BUILD.gn
diff --git a/ios/public/provider/web/BUILD.gn b/ios/public/provider/web/BUILD.gn
deleted file mode 100644
index 7be26961d7cce898743839728477ce17662dec96..0000000000000000000000000000000000000000
--- a/ios/public/provider/web/BUILD.gn
+++ /dev/null
@@ -1,21 +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.
-
-source_set("web") {
-  configs += [ "//build/config/compiler:enable_arc" ]
-  sources = [
-    "web_controller_provider.h",
-    "web_controller_provider.mm",
-    "web_controller_provider_factory.h",
-    "web_controller_provider_factory.mm",
-  ]
-
-  deps = [
-    "//base",
-    "//ios/web",
-    "//url",
-  ]
-
-  allow_circular_includes_from = [ "//ios/web" ]
-}