Revert "Merge to upstream r304942."

This reverts commit 83b1388ecd, reversing
changes made to f20819f925.

Test: treehugger
Bug: None

test/libcxx/utilities/template.bitset/includes.pass.cpp

@@ -1,32 +0,0 @@
-//===----------------------------------------------------------------------===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-// test that <bitset> includes <cstddef>, <string>, <stdexcept> and <iosfwd>
-
-#include <bitset>
-
-#ifndef _LIBCPP_CSTDDEF
-#error <cstddef> has not been included
-#endif
-
-#ifndef _LIBCPP_STRING
-#error <string> has not been included
-#endif
-
-#ifndef _LIBCPP_STDEXCEPT
-#error <stdexcept> has not been included
-#endif
-
-#ifndef _LIBCPP_IOSFWD
-#error <iosfwd> has not been included
-#endif
-
-int main()
-{
-}