Remove unnecessary script usage (#2126)

Scripts are not necessary to perform this automation.

source/_cookbook/turn_on_light_for_10_minutes_when_motion_detected.markdown

@@ -16,37 +16,22 @@ This recipe will turn on a light when there is motion and turn off the light whe
 
 ```yaml
 automation:
-  alias: Turn on kitchen lights when there is movement
+- alias: Turn on kitchen light when there is movement
   trigger:
-    - platform: state
-      entity_id: sensor.motion_sensor
-      to: 'on'
+    platform: state
+    entity_id: sensor.motion_sensor
+    to: 'on'
   action:
     service: homeassistant.turn_on
-    entity_id: script.timed_lamp
+    entity_id: light.kitchen
 
-script:
-  timed_lamp:
-    alias: "Turn on lamp and set timer"
-    sequence:
-      # Cancel ev. old timers
-      - service: script.turn_off
-        data:
-           entity_id: script.timer_off
-      - service: light.turn_on
-        data:
-          entity_id: light.kitchen
-      # Set new timer
-      - service: script.turn_on
-        data:
-          entity_id: script.timer_off
-
-  timer_off:
-    alias: "Turn off lamp after 10 minutes"
-    sequence:
-      - delay:
-          minutes: 10
-      - service: light.turn_off
-        data:
-          entity_id: light.kitchen
-```
+- alias: Turn off kitchen light 10 minutes after last movement
+  trigger:
+    platform: state
+    entity_id: sensor.motion_sensor
+    to: 'off'
+    for:
+      minutes: 10
+  action:
+    service: homeassistant.turn_off
+    entity_id: light.kitchen_light