[X86] Remove unnecessary check for integer VT from combineShiftRightArithmetic.

I doubt there's any way to create a ashr for an FP type.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@321057 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed