Remove an unused parameter and include after r197273

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@197274 91177308-0d34-0410-b5e6-96231b3b80d8
Consolidate DataLayout string testing in one file.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@197276 91177308-0d34-0410-b5e6-96231b3b80d8