Update linker_hand_l7_can.py

Author: hejianxin79

LinkerHand/core/can/linker_hand_l7_can.py

@@ -3,7 +3,6 @@
 import threading
 import numpy as np
 from enum import Enum
-from sensor_msgs.msg import JointState
 
 
 class LinkerHandL7Can:
@@ -267,4 +266,4 @@ def close_can_interface(self):
         if self.receive_thread.is_alive():
             self.receive_thread.join()
         if self.bus:
-            self.bus.shutdown()
+            self.bus.shutdown()