Remove redundant str cast - sensor value conversion (#55204)

homeassistant/components/sensor/__init__.py

@@ -291,7 +291,7 @@ class SensorEntity(Entity):
             # Suppress ValueError (Could not convert sensor_value to float)
             with suppress(ValueError):
                 temp = units.temperature(float(value), unit_of_measurement)
-                value = str(round(temp) if prec == 0 else round(temp, prec))
+                value = round(temp) if prec == 0 else round(temp, prec)
 
         return value
 

tests/components/mhz19/test_sensor.py

@@ -122,4 +122,4 @@ async def test_temperature_sensor_f(mock_function, hass):
         sensor.hass = hass
         sensor.update()
 
-        assert sensor.state == "75"
+        assert sensor.state == 75