One more CI fix (#72313)

## About The Pull Request

Most PRs are now passing after #72299 but a couple of them still failed
for the below reason, this hopefully fixes it
Unfortunately because it only fails _sometimes_ the tests passing on
this PR isn't proof that I actually fixed anything

## Why It's Good For The Game


![image](https://user-images.githubusercontent.com/7483112/209746073-d3001f5a-09c9-4763-8aca-114c44b3c8f8.png)

## Changelog

Not player facing

code/datums/components/remote_materials.dm

@@ -54,6 +54,7 @@ handles linking back and forth.
 		// specify explicitly in case the other component is deleted first
 		var/atom/P = parent
 		mat_container.retrieve_all(P.drop_location())
+		QDEL_NULL(mat_container)
 	return ..()
 
 /datum/component/remote_materials/proc/_MakeLocal()