NaCl: Cleanup: Remove PpapiPluginRegisterDefaultThreadCreator()

ppapi/native_client/src/shared/ppapi_proxy/plugin_globals.cc

 // 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.
 
 #include "native_client/src/shared/platform/nacl_check.h"
 #include "native_client/src/shared/ppapi_proxy/plugin_globals.h"
 #include "native_client/src/shared/ppapi_proxy/plugin_ppb_core.h"
 #include "native_client/src/shared/ppapi_proxy/plugin_ppb_var.h"
 #include "native_client/src/shared/ppapi_proxy/ppruntime.h"
 #include "native_client/src/shared/ppapi_proxy/untrusted/srpcgen/ppp_rpc.h"
@@ skipping 178 matching lines @@
   if (!NaClSrpcModuleInit()) {
     return 1;
   }
   NaClLogModuleInit();  // Enable NaClLog'ing used by CHECK().
   initialized = 1;
   return 0;
 }
 
 int PpapiPluginMain() {
   IrtInit();
-  PpapiPluginRegisterDefaultThreadCreator();
   // Designate this as the main thread for PPB_Core::IsMainThread().
   ppapi_proxy::PluginCore::MarkMainThread();
   if (!NaClSrpcAcceptClientConnection(PppRpcs::srpc_methods)) {
     return 1;
   }
   NaClSrpcModuleFini();
 
   return 0;
 }