Reduce build warnings

src/mir/builder/control_flow/joinir/loop_context.rs

@@ -23,6 +23,7 @@ use crate::mir::loop_pattern_detection::{LoopFeatures, LoopPatternKind};
 /// 1. Create with `new()` - AST + Router info only
 /// 2. Call `set_canonicalizer_result()` - Add Canonicalizer output
 /// 3. Call `verify_parity()` - Check consistency (dev-only)
+#[allow(dead_code)]
 #[derive(Debug)]
 pub struct LoopProcessingContext<'a> {
     // ========================================================================
@@ -56,6 +57,7 @@ pub struct LoopProcessingContext<'a> {
     pub features: LoopFeatures,
 }
 
+#[allow(dead_code)]
 impl<'a> LoopProcessingContext<'a> {
     /// Create new context (canonicalizer not run yet)
     ///