Revert "indicate tag type in C"

This reverts commit 4963ea3107a2fdfae21f7806896905f20b21ff0d.

This change was wrong.  The parameter type is sugared via a typedef.  The errors
generated may have been due to a different root cause, and should be fixed
through the recent series of changes.

git-svn-id: https://llvm.org/svn/llvm-project/libcxxabi/trunk@228365 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed