Clean up

tutorials/pick_and_place/Scripts/TrajectoryPlanner.cs

         rightGripper = rightGripperGameObject.GetComponent<ArticulationBody>();
         leftGripper = leftGripperGameObject.GetComponent<ArticulationBody>();
     }
-
-    public void DrawTrajectory(double[] positions, DebugDraw drawing)
-    {
-/*        for (int Idx = 0; Idx < positions.Length; ++Idx)
-        {
-            jointArticulationBodies[Idx].;
-        }*/
-    }
 }

tutorials/pick_and_place/Scripts/TrajectoryVisualizer.cs

-using System.Collections;
-using System.Collections.Generic;
-using UnityEngine;
-
-public class TrajectoryVisualizer : MonoBehaviour
-{
-    public static TrajectoryVisualizer instance;
-    public GameObject niryoOne;
-
-    private void Awake()
-    {
-        instance = this;
-    }
-
-    public void DrawRobot(float[] joints, DebugDraw drawing)
-    {
-
-    }
-}