[MIRROR] Moving a signal to the connect loc list for projectiles. [MDB IGNORE] (#22966)

* Moving a signal to the connect loc list for projectiles. (#77448)

## About The Pull Request
Projectiles already have a connect_loc element attached to them.

* Moving a signal to the connect loc list for projectiles.

---------

Co-authored-by: Ghom <42542238+Ghommie@users.noreply.github.com>

code/modules/projectiles/projectile.dm

@@ -197,6 +197,7 @@
 	var/embed_falloff_tile
 	var/static/list/projectile_connections = list(
 		COMSIG_ATOM_ENTERED = PROC_REF(on_entered),
+		COMSIG_ATOM_ATTACK_HAND = PROC_REF(attempt_parry),
 	)
 	//SKYRAT ADDITION START
 	/// If this should be able to hit the target even on direct firing when `ignored_factions` applies
@@ -214,7 +215,6 @@
 	if(embedding)
 		updateEmbedding()
 	AddElement(/datum/element/connect_loc, projectile_connections)
-	RegisterSignal(src, COMSIG_MOVABLE_MOVED, PROC_REF(on_enter))
 
 /obj/projectile/proc/Range()
 	range--
@@ -386,15 +386,6 @@
 		return
 	Impact(A)
 
-/// Signal proc for when a projectile enters a turf.
-/obj/projectile/proc/on_enter(datum/source, atom/old_loc, dir, forced, list/old_locs)
-	SIGNAL_HANDLER
-
-	UnregisterSignal(old_loc, COMSIG_ATOM_ATTACK_HAND)
-
-	if(isturf(loc))
-		RegisterSignal(loc, COMSIG_ATOM_ATTACK_HAND, PROC_REF(attempt_parry))
-
 /// Signal proc for when a mob attempts to attack this projectile or the turf it's on with an empty hand.
 /obj/projectile/proc/attempt_parry(datum/source, mob/user, list/modifiers)
 	SIGNAL_HANDLER