Reverts the second mob clean up because of incomplete implementation.

This caused an error that would then cause machinery to hang on the server, and was reproduced successfully.

code/game/objects/items/devices/modkit.dm

@@ -23,7 +23,8 @@
 
 	if(!parts)
 		user << "<span class='warning'>This kit has no parts for this modification left.</span>"
-		user.deleteItem(src)
+		user.drop_from_inventory(src)
+		qdel(src)
 		return
 
 	var/allowed = 0
@@ -58,7 +59,8 @@
 		parts &= ~MODKIT_SUIT
 
 	if(!parts)
-		user.deleteItem(src)
+		user.drop_from_inventory(src)
+		qdel(src)
 
 /obj/item/device/modkit/examine(mob/user)
 	..(user)