Removes network ID and some minor other things (#74789)

## About The Pull Request

Removes network_id as it was completely unused now.

Also reworks the maints access secret buttons to work with how accesses
work now, taking into account req_one_access. This is theoretically a
problem when we moved to req_one_access more often in maints so
departments can access their own maint areas.

## Why It's Good For The Game

This is just minor changes I found while trying to edit other things,
and thought I should PR it.

## Changelog

🆑
admin: Secret buttons for Engineering/Brig maint accesses should now
work more consistently.
/🆑

code/modules/modular_computers/computers/item/computer.dm

@@ -651,7 +651,7 @@ GLOBAL_LIST_EMPTY(TabletMessengers) // a list of all active messengers, similar
 	if(!get_ntnet_status())
 		return FALSE
 
-	return SSmodular_computers.add_log("[src]: [text]", network_id)
+	return SSmodular_computers.add_log("[src]: [text]")
 
 /obj/item/modular_computer/proc/shutdown_computer(loud = 1)
 	kill_program(forced = TRUE)