Change stack to use _mimic

Author: Jepear19

Industrial/ur5_gripper_description/config/ur5_controllers.yaml

@@ -21,11 +21,6 @@ joint_state_broadcaster:
       - wrist_2_joint
       - wrist_3_joint
       - robotiq_85_left_knuckle_joint
-      - robotiq_85_right_knuckle_joint
-      - robotiq_85_left_inner_knuckle_joint
-      - robotiq_85_right_inner_knuckle_joint
-      - robotiq_85_left_finger_tip_joint
-      - robotiq_85_right_finger_tip_joint
 
     interfaces:
       - position