chore: remove unused imports and variables (zero warnings)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/modules/home/modify/fillet.rs

@@ -9,7 +9,7 @@
 //   Pick two lines (line-only; arcs are not chamferable).
 //   Finds intersection, backs off dist1 along line 1 and dist2 along line 2.
 
-use acadrust::entities::{Arc as ArcEnt, Line as LineEnt, LwPolyline, LwVertex};
+use acadrust::entities::{Arc as ArcEnt, Line as LineEnt, LwPolyline};
 use acadrust::types::Vector3;
 use acadrust::{EntityType, Handle};
 use glam::Vec3;