Cleans up some extra args in Destroy() (#80642)

## About The Pull Request

After https://github.com/tgstation/tgstation/pull/80628, these shouldn't
be needed anymore right?

## Why It's Good For The Game

Cleans up some vestigial code

## Changelog
EDIT: Not player-facing.

code/modules/requests/request_manager.dm

@@ -25,7 +25,7 @@ GLOBAL_DATUM_INIT(requests, /datum/request_manager, new)
 	/// List where requests can be accessed by ID
 	var/list/requests_by_id = list()
 
-/datum/request_manager/Destroy(force, ...)
+/datum/request_manager/Destroy(force)
 	QDEL_LIST(requests)
 	return ..()