Remove build_angle.gyp.

This file is a duplicate of angle.gyp, and we can remove it now that
Chrome and Blink are finished with it.

BUG=angle:460

Change-Id: Ida68c8343921ebe9a37b5bcd982e114c91febc3d
Reviewed-on: https://chromium-review.googlesource.com/225053
Tested-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Shannon Woods <shannonwoods@chromium.org>
diff --git a/src/build_angle.gyp b/src/build_angle.gyp
deleted file mode 100644
index 024694c..0000000
--- a/src/build_angle.gyp
+++ /dev/null
@@ -1,10 +0,0 @@
-# Copyright (c) 2012 The ANGLE Project Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-{
-    'includes':
-    [
-        'angle.gypi',
-    ],
-}