Delete gyp files from media/

media/media_variables.gypi

Index: media/media_variables.gypi
diff --git a/media/media_variables.gypi b/media/media_variables.gypi
deleted file mode 100644
index 8bb6da1b107be13fd8683bb03894dbbc0e555308..0000000000000000000000000000000000000000
--- a/media/media_variables.gypi
+++ /dev/null
@@ -1,19 +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.
-
-# Common media variables.
-{
-  'variables': {
-    'conditions': [
-      ['OS == "ios"', {
-        # iOS doesn't use FFmpeg or libvpx by default.
-        'media_use_ffmpeg%': 0,
-        'media_use_libvpx%': 0,
-      }, {
-        'media_use_ffmpeg%': 1,
-        'media_use_libvpx%': 1,
-      }],
-    ],
-  },
-}