Revert "Fix TestPtrRef2Typedef with new const adornment on expected ref type."

The additional "const" breaks the FreeBSD buildbot, and does not appear
to be due to a LLVM or Clang change.  Revert the change while
investigating further.

This reverts revision 206619.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@206751 91177308-0d34-0410-b5e6-96231b3b80d8