Reduce build warnings

src/mir/builder/control_flow/normalization/execute_box.rs

@@ -162,6 +162,7 @@ impl NormalizationExecuteBox {
     /// Execute Phase 132-133: Loop + post assignments + return
     ///
     /// ## Phase 141 P1.5: Added prefix_variables parameter
+    #[allow(dead_code)]
     fn execute_loop_with_post(
         builder: &mut MirBuilder,
         plan: &NormalizationPlan,

src/mir/builder/control_flow/normalization/plan.rs

@@ -17,6 +17,7 @@ pub struct NormalizationPlan {
 
 /// Kind of normalization pattern detected
 #[derive(Debug, Clone, PartialEq, Eq)]
+#[allow(dead_code)]
 pub enum PlanKind {
     /// Phase 131: loop(true) { ... break } alone
     ///
@@ -66,6 +67,7 @@ impl NormalizationPlan {
         note = "Use loop_only() instead. Statement-level normalization makes this obsolete."
     )]
     #[allow(deprecated)]
+    #[allow(dead_code)]
     pub fn loop_with_post(post_assign_count: usize) -> Self {
         // consumed = 1 (loop) + N (assigns) + 1 (return)
         let consumed = 1 + post_assign_count + 1;