Fix dropship equipment infinite loop (#5823)

# About the pull request

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Resolves issue patched by
#5817
# Explain why it's good for the game
Bugs are bad

# Testing Photographs and Procedure
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<summary>Screenshots & Videos</summary>

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# Changelog
:cl:
code: removed duplicated signal code from dropship equipment
/:cl:

code/modules/cm_marines/dropship_equipment.dm

@@ -21,9 +21,6 @@
 	var/skill_required = SKILL_PILOT_TRAINED
 	var/combat_equipment = TRUE
 
-/obj/structure/dropship_equipment/Initialize()
-	. = ..()
-	RegisterSignal(src, COMSIG_ATOM_DIR_CHANGE, PROC_REF(on_dir_change))
 
 /obj/structure/dropship_equipment/Destroy()
 	QDEL_NULL(ammo_equipped)
@@ -37,14 +34,8 @@
 		if(linked_console.selected_equipment && linked_console.selected_equipment == src)
 			linked_console.selected_equipment = null
 		linked_console = null
-	UnregisterSignal(src, COMSIG_ATOM_DIR_CHANGE)
 	. = ..()
 
-/obj/structure/dropship_equipment/proc/on_dir_change(datum/source, old_dir, new_dir)
-	SIGNAL_HANDLER
-	if(old_dir == new_dir)
-		return
-	update_equipment()
 
 /obj/structure/dropship_equipment/attack_alien(mob/living/carbon/xenomorph/current_xenomorph)
 	if(unslashable)