Reduce unused warnings in tests and helpers

src/mir/builder/control_flow/joinir/patterns/pattern2/api/promote_runner.rs

@@ -22,7 +22,7 @@ pub(in crate::mir::builder) fn try_promote(
     body: &[ASTNode],
     inputs: Pattern2Inputs,
     debug: bool,
-    verbose: bool,
+    _verbose: bool,
 ) -> Result<PromoteDecision, String> {
     let mut inputs = inputs;
     use crate::mir::join_ir::lowering::digitpos_condition_normalizer::DigitPosConditionNormalizer;