diff --git a/src/geo/point.js b/src/geo/point.js
index add35a8c..1c270f35 100644
--- a/src/geo/point.js
+++ b/src/geo/point.js
@@ -441,10 +441,6 @@ class Point {
         return this === p || (this.x === p.x && this.y === p.y && this.z === p.z);
     }
 
-    isEqual2D(p) {
-        return this === p || (this.x === p.x && this.y === p.y);
-    }
-
     /**
      * returns true if points are close enough to be considered equivalent
      */
diff --git a/src/geo/slope.js b/src/geo/slope.js
index 1777832d..f95c4137 100644
--- a/src/geo/slope.js
+++ b/src/geo/slope.js
@@ -60,13 +60,6 @@ export class Slope {
         return this;
     }
 
-    invert() {
-        this.dx = -this.dx;
-        this.dy = -this.dy;
-        this.angle = 180 - this.angle;
-        return this;
-    }
-
     angleDiff(s2,sign) {
         const n1 = this.angle;
         const n2 = s2.angle;
diff --git a/src/kiri/core/conf.js b/src/kiri/core/conf.js
index ae5512d5..f4fd6ccd 100644
--- a/src/kiri/core/conf.js
+++ b/src/kiri/core/conf.js
@@ -573,7 +573,6 @@ export const conf = {
                 camTabsMidline: false,
                 camTabsWidth: 5,
                 camTolerance: 0,
-                camTolerance: 0,
                 camToolInit: true,
                 camTraceDogbone: false,
                 camTraceDown: 0,