Re-apply r346985: [ADT] Drop llvm::Optional clang-specific optimization for trivially copyable types

Remove a test case that was added with the optimization we are now
removing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@347004 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed