Removes circular dependency error

custom_components/versatile_thermostat/base_thermostat.py

@@ -109,8 +109,6 @@ from .const import (
     PRESET_AC_SUFFIX,
 )
 
-from .commons import get_tz
-
 from .underlyings import UnderlyingEntity
 
 from .prop_algorithm import PropAlgorithm
@@ -120,6 +118,12 @@ from .ema import EstimatedMobileAverage
 _LOGGER = logging.getLogger(__name__)
 
 
+def get_tz(hass: HomeAssistant):
+    """Get the current timezone"""
+
+    return dt_util.get_time_zone(hass.config.time_zone)
+
+
 class BaseThermostat(ClimateEntity, RestoreEntity):
     """Representation of a base class for all Versatile Thermostat device."""