Remove GYP files.

ios/web/ios_web_shell.gyp

Index: ios/web/ios_web_shell.gyp
diff --git a/ios/web/ios_web_shell.gyp b/ios/web/ios_web_shell.gyp
deleted file mode 100644
index 244c1ceb29ab64a11803b2d8c9d3462b473e0a3d..0000000000000000000000000000000000000000
--- a/ios/web/ios_web_shell.gyp
+++ /dev/null
@@ -1,18 +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.
-
-{
-  'variables': {
-    'chromium_code': 1,
-   },
-  'targets': [
-    {
-      # GN version: //ios/web/shell:ios_web_shell
-      'target_name': 'ios_web_shell',
-      'includes': [
-        'ios_web_shell_exe.gypi',
-      ]
-    },
-  ],
-}