[llvm] [IR] Remove unused and mark debug-only verifier templates (NFC) (PR #202975)

[Aiden Grossman via llvm-commits]

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@@ -267,8 +267,9 @@ static bool containsGCPtrType(Type *Ty) {
 }
 
 // Debugging aid -- prints a [Begin, End) range of values.
-template<typename IteratorTy>
-static void PrintValueSet(raw_ostream &OS, IteratorTy Begin, IteratorTy End) {
+template <typename IteratorTy>
+[[maybe_unused]] static void PrintValueSet(raw_ostream &OS, IteratorTy Begin,
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boomanaiden154 wrote:

Can we get a comment here on why this is `[[maybe_unused]]`? It's not immediately inferable from the direct context.

https://github.com/llvm/llvm-project/pull/202975