Remove initial values from temperature inputs to persist across restarts

The initial: parameter was resetting temperature_high and temperature_low
to their default values on every Home Assistant restart. Removing these
allows the values to be restored from the state database.

Author: basnijholt

includes/input_numbers.yaml

@@ -13,15 +13,13 @@ temperature_low:
   name: Temperature low
   min: 10
   max: 22
-  initial: 14
   step: 0.5
   icon: mdi:temperature-celsius
 
 temperature_high:
   name: Temperature high
   min: 10
   max: 22
-  initial: 20
   step: 0.5
   icon: mdi:temperature-celsius