Revert "[MIRPrinter] Print empty successor lists when they cannot be guessed"

This reverts commit r313685.

I thought I had ran ninja check, but apparently I didn't...
Need to update a bunch of mir tests.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@313686 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed