Revert "[TLI] Robustize SDAG proto checking by merging it into TLI."

This reverts commit r292189, as it causes issues on SystemZ bots.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@292191 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed