Remove physreg support from adjustCopiesBackFrom and removeCopyByCommutingDef.

After physreg coalescing was disabled, these functions can't do anything
useful with physregs anyway.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157849 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed