message: fix(api): Remove incorrect call to `cache_instrument_models`
diff: @@ -395,7 +395,7 @@ class Robot(object):
  raise RuntimeError('Instrument {0} already on {1} mount'.format(
  prev_instr.name, mount))
  self._instruments[mount] = instrument
  - self.cache_instrument_models()
  +
  instrument.instrument_actuator = self._actuators[mount]['plunger']
  instrument.instrument_mover = self._actuators[mount]['carriage']
  