[feat] Add knip for unused code detection (#4890)

src/extensions/core/load3d/conditional-lines/OutsideEdgesGeometry.js

@@ -1,48 +0,0 @@
-/*
-Taken from: https://github.com/gkjohnson/threejs-sandbox/tree/master/conditional-lines
-under MIT license
- */
-import { BufferAttribute, BufferGeometry, Vector3 } from 'three'
-
-const vec = new Vector3()
-export class OutsideEdgesGeometry extends BufferGeometry {
-  constructor(geometry) {
-    super()
-
-    const edgeInfo = {}
-    const index = geometry.index
-    const position = geometry.attributes.position
-    for (let i = 0, l = index.count; i < l; i += 3) {
-      const indices = [index.getX(i + 0), index.getX(i + 1), index.getX(i + 2)]
-
-      for (let j = 0; j < 3; j++) {
-        const index0 = indices[j]
-        const index1 = indices[(j + 1) % 3]
-
-        const hash = `${index0}_${index1}`
-        const reverseHash = `${index1}_${index0}`
-        if (reverseHash in edgeInfo) {
-          delete edgeInfo[reverseHash]
-        } else {
-          edgeInfo[hash] = [index0, index1]
-        }
-      }
-    }
-
-    const edgePositions = []
-    for (const key in edgeInfo) {
-      const [i0, i1] = edgeInfo[key]
-
-      vec.fromBufferAttribute(position, i0)
-      edgePositions.push(vec.x, vec.y, vec.z)
-
-      vec.fromBufferAttribute(position, i1)
-      edgePositions.push(vec.x, vec.y, vec.z)
-    }
-
-    this.setAttribute(
-      'position',
-      new BufferAttribute(new Float32Array(edgePositions), 3, false)
-    )
-  }
-}