Revert "Teach the IR verifier to reject conflicting debug info for function arguments."

This reverts commit r295749 while investigating PR32042.

It looks like this check uncovered a problem in the frontend that
needs to be fixed before the check can be enabled again.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@296005 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed