Remove last_reset from vicare sensor (home-assistant#63879)

Author: emontnemery

homeassistant/components/vicare/sensor.py

@@ -30,7 +30,6 @@
 )
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
-import homeassistant.util.dt as dt_util
 
 from . import ViCareRequiredKeysMixin
 from .const import (
@@ -425,7 +424,6 @@ def __init__(
         self._api = api
         self._device_config = device_config
         self._state = None
-        self._last_reset = dt_util.utcnow()
 
     @property
     def device_info(self):
@@ -457,14 +455,8 @@ def native_value(self):
         """Return the state of the sensor."""
         return self._state
 
-    @property
-    def last_reset(self):
-        """Return the time when the sensor was last reset."""
-        return self._last_reset
-
     def update(self):
         """Update state of sensor."""
-        self._last_reset = dt_util.start_of_local_day()
         try:
             with suppress(PyViCareNotSupportedFeatureError):
                 self._state = self.entity_description.value_getter(self._api)