[InstCombine] don't assert that division-by-constant has been folded (PR30281)

This is effectively a revert of:
https://reviews.llvm.org/rL280115

And this should fix
https://llvm.org/bugs/show_bug.cgi?id=30281:



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@280677 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed