message: fix(api): remove unnecessary tip return
  In return tip, labware return tip was being called explicitly even though it was called implicitly
  under drop_tip
diff: @@ -1181,14 +1181,6 @@ class InstrumentContext(CommandPublisher):
  bot = loc.bottom()
  bot = bot._replace(point=bot.point._replace(z=bot.point.z + 10))
  self.drop_tip(bot, home_after=home_after)
  - try:
  - loc.parent.return_tips(loc, self.channels)
  - except AssertionError:
  - # The failure mode here is "can't return the tip", and might
  - # happen because another pipette took a tip from the tiprack
  - # since this pipette did. In this case just don't return the
  - # tip to the tip tracker
  - self._log.exception('Could not return tip to tip tracker')
  return self
  