Remove GYP files.

base/third_party/libevent/libevent_nacl_nonsfi.gyp

-# Copyright 2014 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.
-
-{
-  'includes': [
-    '../../../build/common_untrusted.gypi',
-  ],
-  'conditions': [
-    ['disable_nacl==0 and disable_nacl_untrusted==0', {
-      'targets': [
-        {
-          'target_name': 'event_nacl_nonsfi',
-          'type': 'none',
-          'sources': [
-            'buffer.c',
-            'evbuffer.c',
-            'event.c',
-            'evutil.c',
-            'log.c',
-            'poll.c',
-            'strlcpy.c',
-            'nacl_nonsfi/config.h',
-            'nacl_nonsfi/event-config.h',
-            'nacl_nonsfi/random.c',
-            'nacl_nonsfi/signal_stub.c',
-          ],
-          'defines': [
-            'HAVE_CONFIG_H',
-          ],
-          'include_dirs': [
-            'nacl_nonsfi',
-          ],
-          'variables': {
-            'nacl_untrusted_build': 1,
-            'nlib_target': 'libevent_nacl_nonsfi.a',
-            'build_glibc': 0,
-            'build_newlib': 0,
-            'build_irt': 0,
-            'build_pnacl_newlib': 0,
-            'build_nonsfi_helper': 1,
-          },
-        },
-      ],
-    }],
-  ],
-}