remove PortableSpinLock.h

Summary:
Remove the PortableSpinLock header file now that all call sites have
been migrated to the new SpinLock name.

Test Plan: Built and ran unit tests for folly, thrift, and proxygen.

Reviewed By: seanc@fb.com

Subscribers: trunkagent, doug, net-systems@, exa, folly-diffs@

FB internal diff: D1734685

Signature: t1:1734685:1418335405:e834f64d7282393e942a1de3638f4cf67410eaab

folly/Makefile.am

@@ -152,7 +152,6 @@ nobase_follyinclude_HEADERS = \
 	io/Cursor.h \
 	io/IOBuf.h \
 	io/IOBufQueue.h \
-	io/PortableSpinLock.h \
 	io/RecordIO.h \
 	io/RecordIO-inl.h \
 	io/TypedIOBuf.h \

folly/io/PortableSpinLock.h

-/*
- * Copyright 2014 Facebook, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *   http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <folly/SpinLock.h>
-
-namespace folly { namespace io {
-
-// These are temporary typedefs to ease the transition from
-// folly::io::PortableSpinLock to folly::SpinLock.
-//
-// I will remove these in a separate diff after updating all call sites
-// that use PortableSpinLock.
-typedef ::folly::SpinLock PortableSpinLock;
-typedef ::folly::SpinLockGuard PortableSpinLockGuard;
-
-}}