Refactors and fixes RPEDs

code/game/mecha/mech_bay.dm

@@ -62,9 +62,6 @@
 		recharging_turf = get_step(loc, dir)
 		return
 
-	if(exchange_parts(user, I))
-		return
-
 	if(default_deconstruction_crowbar(I))
 		return
 	return ..()

code/game/mecha/mech_fabricator.dm

@@ -401,9 +401,6 @@
 	if(default_deconstruction_screwdriver(user, "fab-o", "fab-idle", W))
 		return TRUE
 
-	if(exchange_parts(user, W))
-		return TRUE
-
 	if(default_deconstruction_crowbar(W))
 		return TRUE