refactor(phase62): Delete phi_input_collector.rs (-384 lines)
Phase 62前倒し: PhiInputCollectorの物理削除 Changes: - Delete src/mir/phi_core/phi_input_collector.rs (-384 lines) - Inline PhiInputCollector logic in json_v0_bridge/lowering/loop_.rs - sanitize: BTreeMap dedup + sort - optimize_same_value: check all inputs for same value - Remove mod declaration in phi_core/mod.rs Rationale: - PhiInputCollector already inlined in Phase 59 (loopform_builder.rs) - Last remaining usage was in JSON v0 Bridge - Simple inline preserves exact behavior Impact: - -384 lines (Box + tests) - No behavior change (inline equivalent) - Build & test pass ✅ 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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