old_contents: LAST_REBOOT_TIME_FORMAT = '%Y-%m-%d %H:%M:%S'
  PING_IPV4_COMMAND = 'ping -c 3 '
  PING_IPV6_COMMAND = 'ping6 -c 3 '
  PING_PACKET_LOSS_REGEX = '(\d{1,3})\.?\d*\% packet loss'
  
new_contents: PING_IPV4_COMMAND = 'ping -c 3 '
  PING_IPV6_COMMAND = 'ping6 -c 3 '
  PING_PACKET_LOSS_REGEX = '(\d{1,3})\.?\d*\% packet loss'
  
subject: remove unused variable