AMDGPU/SI: Remove unused tablegen multiclass

Reviewers: arsenm

Subscribers: arsenm, llvm-commits

Differential Revision: http://reviews.llvm.org/D13395

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@249221 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed