gets rid of : usage

code/ATMOSPHERICS/components/unary_devices/outlet_injector.dm

@@ -20,7 +20,6 @@
 
 	var/frequency = 0
 	var/id
-	var/id_tag = null
 	var/datum/radio_frequency/radio_connection
 	Mtoollink = 1
 	settagwhitelist = list("id_tag")

code/ATMOSPHERICS/components/unary_devices/unary_base.dm

@@ -2,7 +2,7 @@
 	dir = SOUTH
 	initialize_directions = SOUTH
 	layer = TURF_LAYER+0.1
-
+	var/id_tag
 	var/datum/gas_mixture/air_contents
 
 	var/obj/machinery/atmospherics/node

code/ATMOSPHERICS/components/unary_devices/vent_pump.dm

@@ -17,7 +17,6 @@
 
 	var/area/initial_loc
 	var/area_uid
-	var/id_tag = null
 
 	req_one_access_txt = "24;10"
 

code/ATMOSPHERICS/components/unary_devices/vent_scrubber.dm

@@ -15,7 +15,7 @@
 	can_unwrench = 1
 
 	var/area/initial_loc
-	var/id_tag = null
+
 	var/frequency = ATMOS_VENTSCRUB
 	var/datum/radio_frequency/radio_connection