Remove warning on script delay

[amelchio]

Description:

This is another attempt at the fix in #16923.

Apparently I got confused by the naming. The _async_remove_listener() helper actually does more than just remove() the listener. The result is (harmless) warnings about double timer unsubscribes for script delays.

This reworked fix just ignores the exception that could happen if a script is turned on/off right as its timer expires.

Related issue (if applicable): fixes #17204

Example entry for configuration.yaml (if applicable):

script:
 vdr_ambilight_off:
    sequence:
      - service: switch.turn_off
        entity_id: switch.433_hyperion
      - delay: '00:00:02'
      - service: shell_command.easyvdr_off

Checklist:

• The code change is tested and works locally.
• Local tests pass with tox.

If the code does not interact with devices:

• Tests have been added to verify that the new code works.

[pvizeli]

use suppress

[pvizeli]

use suppress