In maintel/mtcs.py, remove settling time after clearing slew flag (cu…

…rrently refered to as close booster valve in the code).

python/lsst/ts/observatory/control/maintel/mtcs.py

@@ -2628,7 +2628,6 @@ async def close_m1m3_booster_valve(self) -> None:
         """Close M1M3 booster valves."""
         if self.check.mtm1m3:
             await self._handle_m1m3_booster_valve(open=False)
-            await asyncio.sleep(self.fast_timeout)
 
     async def _handle_m1m3_booster_valve(self, open: bool) -> None:
         """Handle opening the M1M3 booster valves"""