[llvm] [ValueTracking] Use SimplifyQuery in some public APIs (NFC) (PR #68290)

[Florian Hahn via llvm-commits]

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@@ -39,7 +40,6 @@ struct KnownBits;
 class Loop;
 class LoopInfo;
 class MDNode;
-struct SimplifyQuery;
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fhahn wrote:

I think in general we often try to limit includes in headers if forward declarations are sufficient. I don't have any strong feelings about this case, if it is overall beneficial to include it in the header that would be fine.

https://github.com/llvm/llvm-project/pull/68290