Remove all references to GYP

webrtc/modules/rtp_rtcp/test/testFec/test_fec.gypi

-# Copyright (c) 2012 The WebRTC 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 in the root of the source
-# tree. An additional intellectual property rights grant can be found
-# in the file PATENTS.  All contributing project authors may
-# be found in the AUTHORS file in the root of the source tree.
-
-{
-  'targets': [
-    {
-      # The test below takes long to run, no need to add it to any bot.
-      'target_name': 'test_packet_masks_metrics',
-      'type': 'executable',
-      'dependencies': [
-        'rtp_rtcp',
-        '<(webrtc_root)/test/test.gyp:test_support_main',
-        '<(DEPTH)/testing/gtest.gyp:gtest',
-      ],
-      'sources': [
-        'test_packet_masks_metrics.cc',
-        'average_residual_loss_xor_codes.h',
-      ],
-    },
-  ],
-}