Implement Attr dumping in terms of visitors

Remove now-vestigial dumpType and dumpBareDeclRef methods. The old
tablegen generated code used to expect them to be present, but the new
generated code has no such requirement.

Reviewers: aaron.ballman

Subscribers: mgorny, cfe-commits

Differential Revision: https://reviews.llvm.org/D55492

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@350958 91177308-0d34-0410-b5e6-96231b3b80d8
8 files changed