[llvm] InstCombine/Select: remove redundant code (NFC) (PR #112388)

[Yingwei Zheng via llvm-commits]

https://github.com/dtcxzyw approved this pull request.

LGTM.

Another path:
```
(X & Y) == 0 ? X : X ^ Y ->
((X & Y) == 0 ? 0 : Y) ^ X ->
(X & Y) ^ X ->
X & ~Y
```


https://github.com/llvm/llvm-project/pull/112388