Remove all .gyp and .gypi files.

tools/xdisplaycheck/xdisplaycheck.gyp

Index: tools/xdisplaycheck/xdisplaycheck.gyp
diff --git a/tools/xdisplaycheck/xdisplaycheck.gyp b/tools/xdisplaycheck/xdisplaycheck.gyp
deleted file mode 100644
index 7030b6fdb7757476bd3b411b932f580d067be5ce..0000000000000000000000000000000000000000
--- a/tools/xdisplaycheck/xdisplaycheck.gyp
+++ /dev/null
@@ -1,19 +0,0 @@
-# Copyright (c) 2009 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.
-
-{
-  'targets': [
-    {
-      # GN version: //tools/xdisplaycheck
-      'target_name': 'xdisplaycheck',
-      'type': 'executable',
-      'dependencies': [
-        '../../build/linux/system.gyp:x11',
-      ],
-      'sources': [
-        'xdisplaycheck.cc',
-      ],
-    },
-  ],
-}