Remove unused function.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179530 91177308-0d34-0410-b5e6-96231b3b80d8
Avoid outputting temporary test file into source tree.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179532 91177308-0d34-0410-b5e6-96231b3b80d8