Revert #6903 (#6995)

Reverts #6903

On lowpop red alert and other actions requiring keycards can become
impossible due to lack of CIC staff, along with the fact of if you are
not a commander you cannot use ares to activate red alert and there will
likely not be a joe

# Changelog
:cl:
balance: Keycard swipers no longer require two unique keycards to
function.
fix: fixed the description text for the card swipe to reduce confusion
/:cl:

---------

Co-authored-by: Zonespace <[email protected]>

code/modules/security_levels/keycard_authentication.dm

@@ -1,6 +1,6 @@
 /obj/structure/machinery/keycard_auth
 	name = "Keycard Authentication Device"
-	desc = "This device is used to trigger station functions, which require more than one ID card to authenticate."
+	desc = "This device is used to trigger station functions, which require multiple swipes of an ID card to authenticate."
 	icon = 'icons/obj/structures/machinery/monitors.dmi'
 	icon_state = "auth_off"
 	unacidable = TRUE
@@ -36,9 +36,6 @@
 			if(active == 1)
 				//This is not the device that made the initial request. It is the device confirming the request.
 				if(event_source)
-					if(event_source.event_triggered_by == user)
-						user.visible_message(SPAN_DANGER("Your ID is rejected, as it is the one that triggered the event!"))
-						return
 					event_source.confirmed = 1
 					event_source.event_confirmed_by = user
 			else if(screen == 2)