[Inlining] Delete redundant optnone/alwaysinline check

The same check is done in InlineCost: https://github.com/llvm/llvm-project/blob/8b0bd54d0ec968df28ccc58bbb537a7b7c074ef2/llvm/lib/Analysis/InlineCost.cpp#L2537-L2552
Also, doing a check on the callee here is confusing, because anything that deals with callee should be done in the inner loop where we proecss all calls from the same caller.

Differential Revision: https://reviews.llvm.org/D95186