Revert "Fix Clang-tidy modernize-deprecated-headers warnings in remaining files; other minor fixes."

This reverts commit r265454 since it broke the build.  E.g.:

  http://lab.llvm.org:8080/green/job/clang-stage1-cmake-RA-incremental_build/22413/

llvm-svn: 265459

1 files changed, 3 insertions, 7 deletions

diff --git a/llvm/lib/Support/Mutex.cpp b/llvm/lib/Support/Mutex.cpp
index db30c73de51..c8d3844d0c9 100644
--- a/llvm/lib/Support/Mutex.cpp
+++ b/llvm/lib/Support/Mutex.cpp
@@ -22,26 +22,22 @@
 #if !defined(LLVM_ENABLE_THREADS) || LLVM_ENABLE_THREADS == 0
 // Define all methods as no-ops if threading is explicitly disabled
 namespace llvm {
-
 using namespace sys;
-
 MutexImpl::MutexImpl( bool recursive) { }
 MutexImpl::~MutexImpl() { }
 bool MutexImpl::acquire() { return true; }
 bool MutexImpl::release() { return true; }
 bool MutexImpl::tryacquire() { return true; }
-
-} // end namespace llvm
+}
 #else
 
 #if defined(HAVE_PTHREAD_H) && defined(HAVE_PTHREAD_MUTEX_LOCK)
 
 #include <cassert>
-#include <cstdlib>
 #include <pthread.h>
+#include <stdlib.h>
 
 namespace llvm {
-
 using namespace sys;
 
 // Construct a Mutex using pthread calls
@@ -114,7 +110,7 @@ MutexImpl::tryacquire()
   return errorcode == 0;
 }
 
-} // end namespace llvm
+}
 
 #elif defined(LLVM_ON_UNIX)
 #include "Unix/Mutex.inc"