Remove unused libpeerconnection code.

third_party/libjingle/overrides/allocator_shim/allocator_proxy.cc

-// Copyright 2013 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 "third_party/libjingle/overrides/allocator_shim/allocator_stub.h"
-
-#if !defined(LIBPEERCONNECTION_IMPLEMENTATION) || defined(LIBPEERCONNECTION_LIB)
-#error "Only compile the allocator proxy with the shared_library implementation"
-#endif
-
-#if defined(OS_MACOSX) || defined(OS_ANDROID)
-#error "The allocator proxy isn't supported (or needed) on mac or android."
-#endif
-
-extern AllocateFunction g_alloc;
-extern DellocateFunction g_dealloc;
-
-// Override the global new/delete routines and proxy them over to the allocator
-// routines handed to us via InitializeModule.
-
-void* operator new(std::size_t n) throw() {
-  return g_alloc(n);
-}
-
-void operator delete(void* p) throw() {
-  g_dealloc(p);
-}