Neighbour remove double check on stableVeloHandler exists

src/neighbourSampling.js

@@ -63,7 +63,7 @@ export default function () {
       velocityDiff /= n*(neighbourSize+sampleSize);
       latestVelocityDiff = velocityDiff;
 
-      if(stableVeloHandler!==null && velocityDiff<stableVelocity){
+      if(velocityDiff<stableVelocity){
         stableVeloHandler();
       }
       else console.log(velocityDiff);