Remove all .gyp and .gypi files.

third_party/brotli/brotli.gyp

Index: third_party/brotli/brotli.gyp
diff --git a/third_party/brotli/brotli.gyp b/third_party/brotli/brotli.gyp
deleted file mode 100644
index e09f0c6cdbad6e2290448f0ffb5142144a5550ab..0000000000000000000000000000000000000000
--- a/third_party/brotli/brotli.gyp
+++ /dev/null
@@ -1,32 +0,0 @@
-# Copyright 2013 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': [
-    {
-      'target_name': 'brotli',
-      'type': 'static_library',
-      'include_dirs': [
-        'dec',
-      ],
-      'sources': [
-        'dec/bit_reader.c',
-        'dec/bit_reader.h',
-        'dec/context.h',
-        'dec/decode.c',
-        'dec/decode.h',
-        'dec/dictionary.h',
-        'dec/huffman.c',
-        'dec/huffman.h',
-        'dec/prefix.h',
-        'dec/safe_malloc.c',
-        'dec/safe_malloc.h',
-        'dec/streams.c',
-        'dec/streams.h',
-        'dec/transform.h',
-        'dec/types.h',
-      ],
-    },
-  ],
-}