Merge pull request #16715 from gero3/MarchingCubes

cleanup MarchingCubes

examples/js/objects/MarchingCubes.js

@@ -563,7 +563,6 @@ THREE.MarchingCubes = function ( resolution, material, enableUvs, enableColors )
 
 			} catch ( err ) {
 
-				userDefineColor = false;
 				ballColor = new THREE.Color( ballx, bally, ballz );
 
 			}

examples/jsm/objects/MarchingCubes.js

@@ -571,7 +571,6 @@ var MarchingCubes = function ( resolution, material, enableUvs, enableColors ) {
 
 			} catch ( err ) {
 
-				userDefineColor = false;
 				ballColor = new Color( ballx, bally, ballz );
 
 			}