[llvm] [NFC][DecoderEmitter] Predicate generation code cleanup (PR #158140)

[Sergei Barannikov via llvm-commits]

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@@ -1134,41 +1133,19 @@ bool DecoderTableBuilder::emitPredicateMatchAux(const Init &Val,
   return true;
 }
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s-barannikov wrote:

Sorry, missed it. emitPredicateMatchAux is now unused.

https://github.com/llvm/llvm-project/pull/158140