dont need lh in evo tests

Author: rickwierenga

pylabrobot/liquid_handling/backends/tecan/EVO_tests.py

@@ -49,7 +49,6 @@ async def send_command(module, command, params=None):
     self.evo.send_command.side_effect = send_command  # type: ignore[method-assign]
 
     self.deck = EVO150Deck()
-    self.lh = LiquidHandler(backend=self.evo, deck=self.deck)
 
     # setup
     self.evo.setup = unittest.mock.AsyncMock()  # type: ignore[method-assign]