Remove GYP files in breakpad, build, and tools.

These are now unused.

Review-Url: https://codereview.chromium.org/2331893004
Cr-Original-Commit-Position: refs/heads/master@{#418010}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 8c0eb8ed764590108f0278e5bbbddec3fc14b522
diff --git a/xdisplaycheck.gyp b/xdisplaycheck.gyp
deleted file mode 100644
index 7030b6f..0000000
--- a/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',
-      ],
-    },
-  ],
-}