chore: cargo fix - remove unused imports

Phase 33-11 Quick Wins - Task 1

- Removed 10 unused imports across JoinIR lowering modules
- Applied via 'cargo fix --allow-dirty'
- No logic changes, only cleanup
- Build: ✅ Success (0 errors, 44 warnings)

Files modified:
- src/mir/join_ir/lowering/generic_case_a/*.rs (5 files)
- src/mir/join_ir/lowering/{if_merge,if_select,loop_patterns,simple_while_minimal}.rs
- src/mir/join_ir_vm_bridge/joinir_function_converter.rs
- src/mir/builder/control_flow/joinir/merge/exit_line/reconnector.rs

src/mir/builder/control_flow/joinir/merge/exit_line/reconnector.rs

@@ -8,7 +8,6 @@
 use crate::mir::builder::joinir_id_remapper::JoinIrIdRemapper;
 use crate::mir::builder::MirBuilder;
 use crate::mir::join_ir::lowering::inline_boundary::JoinInlineBoundary;
-use crate::mir::ValueId;
 
 /// ExitLineReconnector: A Box that manages exit value reconnection
 ///

src/mir/join_ir/lowering/generic_case_a/append_defs.rs

@@ -30,7 +30,6 @@
 //! - `value_id_ranges::funcscanner_append_defs` - ValueId allocation strategy
 //! - `loop_scope_shape::CaseAContext` - Context extraction
 
-use std::collections::BTreeMap;
 
 use crate::mir::join_ir::lowering::loop_scope_shape::CaseAContext;
 use crate::mir::join_ir::lowering::value_id_ranges;

src/mir/join_ir/lowering/generic_case_a/mod.rs

@@ -100,5 +100,3 @@ pub(crate) use append_defs::lower_case_a_append_defs_with_scope;
 pub(crate) use stage1_using_resolver::lower_case_a_stage1_usingresolver_with_scope;
 
 // Re-export helper utilities
-pub(crate) use entry_builder::EntryFunctionBuilder;
-pub(crate) use whitespace_check::{WhitespaceCheckResult, WhitespaceDetector};

src/mir/join_ir/lowering/generic_case_a/skip_ws.rs

@@ -31,7 +31,6 @@
 //! - `value_id_ranges::skip_ws` - ValueId allocation strategy
 //! - `loop_scope_shape::CaseAContext` - Context extraction
 
-use std::collections::BTreeMap;
 
 use crate::mir::join_ir::lowering::loop_scope_shape::CaseAContext;
 use crate::mir::join_ir::lowering::value_id_ranges;

src/mir/join_ir/lowering/generic_case_a/stage1_using_resolver.rs

@@ -30,7 +30,6 @@
 //! - `value_id_ranges::stage1_using_resolver` - ValueId allocation strategy
 //! - `loop_scope_shape::CaseAContext` - Context extraction
 
-use std::collections::BTreeMap;
 
 use crate::mir::join_ir::lowering::loop_scope_shape::CaseAContext;
 use crate::mir::join_ir::lowering::value_id_ranges;

src/mir/join_ir/lowering/generic_case_a/trim.rs

@@ -44,7 +44,6 @@
 //! - `value_id_ranges::funcscanner_trim` - ValueId allocation strategy
 //! - `whitespace_check` - Whitespace detection helper (shared with skip_ws)
 
-use std::collections::BTreeMap;
 
 use crate::mir::join_ir::lowering::loop_scope_shape::CaseAContext;
 use crate::mir::join_ir::lowering::value_id_ranges;

src/mir/join_ir/lowering/if_merge.rs

@@ -15,7 +15,7 @@
 //! - Loop の PHI には触らない（Loop lowering の責務）
 
 use crate::mir::join_ir::{JoinInst, MergePair};
-use crate::mir::{BasicBlockId, MirFunction, MirInstruction, MirType, ValueId};
+use crate::mir::{BasicBlockId, MirFunction, MirInstruction, ValueId};
 use std::collections::HashSet;
 
 // Phase 61-1: If-in-loop context support

src/mir/join_ir/lowering/if_select.rs

@@ -13,7 +13,6 @@
 use crate::mir::join_ir::JoinInst;
 use crate::mir::{BasicBlockId, MirFunction, MirInstruction, ValueId};
 // Phase 63-2: Type hint inference from MIR
-use crate::mir::{ConstValue, MirType};
 
 // Phase 61-1: If-in-loop context support
 use super::if_phi_context::IfPhiContext;

src/mir/join_ir/lowering/loop_patterns.rs

@@ -321,7 +321,7 @@ pub fn lower_loop_with_break_to_joinir(
     // Phase 188-Impl-2: Delegate to minimal lowerer
     // TODO: Extract LoopScopeShape from loop_form for generic implementation
     use crate::mir::join_ir::lowering::loop_scope_shape::LoopScopeShape;
-    use crate::mir::join_ir::lowering::loop_with_break_minimal::lower_loop_with_break_minimal;
+    
     use crate::mir::BasicBlockId;
     use std::collections::{BTreeMap, BTreeSet};
 

src/mir/join_ir/lowering/simple_while_minimal.rs

@@ -44,7 +44,7 @@
 
 use crate::mir::join_ir::lowering::loop_scope_shape::LoopScopeShape;
 use crate::mir::join_ir::{
-    BinOpKind, CompareOp, ConstValue, JoinContId, JoinFuncId, JoinFunction, JoinInst, JoinModule,
+    BinOpKind, CompareOp, ConstValue, JoinFuncId, JoinFunction, JoinInst, JoinModule,
     MirLikeInst, UnaryOp,
 };
 use crate::mir::ValueId;

src/mir/join_ir_vm_bridge/joinir_function_converter.rs

@@ -5,16 +5,14 @@
 //! - ブロック変換の統合
 //! - 関数署名の管理
 
-use crate::ast::Span;
-use crate::mir::join_ir::{JoinFunction, JoinInst, JoinModule};
+use crate::mir::join_ir::{JoinFunction, JoinModule};
 use crate::mir::{
-    BasicBlockId, EffectMask, FunctionSignature, MirFunction, MirInstruction, MirModule, MirType,
-    ValueId,
+    BasicBlockId, EffectMask, FunctionSignature, MirFunction, MirModule, MirType,
 };
 
 use super::joinir_block_converter::JoinIrBlockConverter;
 use super::JoinIrVmBridgeError;
-use super::{convert_mir_like_inst, join_func_name};
+use super::join_func_name;
 
 pub(crate) struct JoinIrFunctionConverter;