清理代码.

src/GraphicsSystem/OffestPolyline.ts

@@ -1,6 +1,6 @@
 import { Box3, Vector3 } from "three";
 import { arrayLast, arrayRemoveIf, arraySortByNumber } from "../Common/ArrayExt";
-import { curveLinkGroup, GetPointAtCurveDir, Vec2DTo3D } from "../Common/CurveUtils";
+import { curveLinkGroup, GetPointAtCurveDir } from "../Common/CurveUtils";
 import { FixIndex } from "../Common/Utils";
 import { Arc } from "../DatabaseServices/Arc";
 import { Circle } from "../DatabaseServices/Circle";
@@ -15,8 +15,8 @@ import { IntersectOption } from "./IntersectWith";
 
 interface offestRes
 {
-    index: number,
-    curve: Curve
+    index: number;
+    curve: Curve;
 }
 
 export class PolyOffestUtil