message: refactor(api): cleanup dfu process comments
diff: @@ -199,13 +199,20 @@ async def upload_via_dfu(
  ) -> Tuple[bool, str]:
  """Run firmware upload command for DFU.
  + Unlike other firmware upload methods, this one doesn't take a `port` argument since
  + the module isn't recognized as a cdc device in dfu mode and hence doesn't get
  + a port. The firmware upload utility, dfu-util, looks for the specific module
  + by searching for available dfu devices. Since we check beforehand that only one
  + dfu device is available during the upload process, this check is sufficient for us.
  +
  + In the future, if we want to make sure that the dfu device available is in fact
  + the one we seek, then we can ask dfu-util to check for available dfu devices with
  + a specific serial number (unrelated to Opentrons' module serial numbers).
  + Hence, this method takes a `dfu_serial` argument instead.
  +
  Returns tuple of success boolean and message from bootloader
  """
  log.info("Starting firmware upload via dfu util")
  -
  - # We don't specify a port since the dfu device doesn't get one &
  - # dfu-util doesn't need it either so I've replaced the 'port' arg with an arg to
  - # fetch dfu device serial. I haven't used it in the below command though.
  dfu_args = [
  "dfu-util",
  "-a 0",
  