Remove unused header from EntryExitInstrumenter

Fixes layering, since Transforms/Utils doesn't depend on CodeGen, so
shouldn't include headers from it.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@328399 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed