No qdel(src) in New

### Testmerges

N/A

### Round ID

N/A

### Description of the issue

qdel in new means something is getting deleted before ssgarbage even thinks it has been created, this is bad.

### What's the fix?

Remove all instances of qdel(src) in new

### Issue Bingo

- [x] Issue could be reproduced at least once
- [X] Issue happened in a recent (less than 7 days ago) round
- [X] Couldn't find an existing issue about this (https://github.com/cmss13-devs/cmss13/issues)