Combat mode component. (#12338)

* Combat mode component.

* Whoops.

* test.

* Oh

* refs begone, and documentation.

code/modules/projectiles/guns/misc/beam_rifle.dm

@@ -77,7 +77,6 @@
 	var/static/image/drained_overlay = image(icon = 'icons/obj/guns/energy.dmi', icon_state = "esniper_empty")
 
 	var/datum/action/item_action/zoom_lock_action/zoom_lock_action
-	var/mob/listeningTo
 
 /obj/item/gun/energy/beam_rifle/debug
 	delay = 0
@@ -178,7 +177,6 @@
 	STOP_PROCESSING(SSfastprocess, src)
 	set_user(null)
 	QDEL_LIST(current_tracers)
-	listeningTo = null
 	return ..()
 
 /obj/item/gun/energy/beam_rifle/proc/aiming_beam(force_update = FALSE)
@@ -260,17 +258,12 @@
 	if(user == current_user)
 		return
 	stop_aiming(current_user)
-	if(listeningTo)
-		UnregisterSignal(listeningTo, COMSIG_MOVABLE_MOVED)
-		listeningTo = null
-	if(istype(current_user))
-		LAZYREMOVE(current_user.mousemove_intercept_objects, src)
+	if(current_user)
+		UnregisterSignal(current_user, COMSIG_MOVABLE_MOVED)
 		current_user = null
 	if(istype(user))
 		current_user = user
-		LAZYOR(current_user.mousemove_intercept_objects, src)
 		RegisterSignal(user, COMSIG_MOVABLE_MOVED, .proc/on_mob_move)
-		listeningTo = user
 
 /obj/item/gun/energy/beam_rifle/onMouseDrag(src_object, over_object, src_location, over_location, params, mob)
 	if(aiming)