Remove PPAPI gyp files.

ppapi/ppapi_host.gypi

Index: ppapi/ppapi_host.gypi
diff --git a/ppapi/ppapi_host.gypi b/ppapi/ppapi_host.gypi
deleted file mode 100644
index 3113ddf5c22a0cb165b2e158da0077638dbdbb4f..0000000000000000000000000000000000000000
--- a/ppapi/ppapi_host.gypi
+++ /dev/null
@@ -1,49 +0,0 @@
-# Copyright (c) 2012 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': [
-    {
-      # GN version: //ppapi/host
-      'target_name': 'ppapi_host',
-      'type': '<(component)',
-      'dependencies': [
-        '../base/base.gyp:base',
-        '../ipc/ipc.gyp:ipc',
-        '../media/media.gyp:shared_memory_support',
-        '../ui/surface/surface.gyp:surface',
-        '../url/url.gyp:url_lib',
-        'ppapi.gyp:ppapi_c',
-        'ppapi_internal.gyp:ppapi_ipc',
-        'ppapi_internal.gyp:ppapi_proxy',
-        'ppapi_internal.gyp:ppapi_shared',
-      ],
-      'defines': [
-        'PPAPI_HOST_IMPLEMENTATION',
-      ],
-      'sources': [
-        # Note: sources list duplicated in GN build.
-        'host/dispatch_host_message.h',
-        'host/error_conversion.cc',
-        'host/error_conversion.h',
-        'host/host_factory.h',
-        'host/host_message_context.cc',
-        'host/host_message_context.h',
-        'host/instance_message_filter.cc',
-        'host/instance_message_filter.h',
-        'host/message_filter_host.cc',
-        'host/message_filter_host.h',
-        'host/ppapi_host.cc',
-        'host/ppapi_host.h',
-        'host/ppapi_host_export.h',
-        'host/resource_host.cc',
-        'host/resource_host.h',
-        'host/resource_message_filter.cc',
-        'host/resource_message_filter.h',
-        'host/resource_message_handler.cc',
-        'host/resource_message_handler.h',
-      ],
-    },
-  ],
-}