Revert r233062 ""float2int": Add a new pass to demote from float to int where possible."

Revert r233062 ""float2int": Add a new pass to demote from float to int where possible."

This caused PR23008, compiles failing with: "Use still stuck around after Def is
destroyed: %.sroa.speculated"

Also reverting follow-up r233064.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233105 91177308-0d34-0410-b5e6-96231b3b80d8