Fix: 删除等待气动手返回信息的语句，降低延迟

backend/device/fubo_pneumatic_finger.py

@@ -74,7 +74,6 @@ class FuboPneumaticFingerClient:
     
     def start(self, command):
         self.ser.write(self.COMMAND_TABLE[command])
-        return self.ser.read()
 
     def status(self):
         status = {"is_connected": self.is_connected}