Convert sensor_schema to use kwargs (#2094)

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

esphome/components/template/sensor/__init__.py

@@ -6,10 +6,7 @@ from esphome.const import (
     CONF_ID,
     CONF_LAMBDA,
     CONF_STATE,
-    DEVICE_CLASS_EMPTY,
-    ICON_EMPTY,
     STATE_CLASS_NONE,
-    UNIT_EMPTY,
 )
 from .. import template_ns
 
@@ -19,11 +16,8 @@ TemplateSensor = template_ns.class_(
 
 CONFIG_SCHEMA = (
     sensor.sensor_schema(
-        UNIT_EMPTY,
-        ICON_EMPTY,
-        1,
-        DEVICE_CLASS_EMPTY,
-        STATE_CLASS_NONE,
+        accuracy_decimals=1,
+        state_class=STATE_CLASS_NONE,
     )
     .extend(
         {