tree 182913b269b00c3af67e7798b30915123ecefa86
parent 58ad8018eba1a48ddf56d45051748a3e25c620fc
author Andrew Geissler <geissonator@yahoo.com> 1716399705 -0500
committer Andrew Geissler <geissonator@yahoo.com> 1716399705 -0500

build-setup.sh: only delete ubuntu user when present

A previous commit (58ad8018e), added code to delete the new "ubuntu"
user in the more recent ubuntu distributions. Unfortunately that
introduces an issue if someone is using an older ubuntu distribution.
The new "ubuntu" user is not present so the delete command fails:
```
"userdel: user 'ubuntu' does not exist"
```

Only delete the user if it's present in the image.

Tested:
- Confirmed script works on old and new ubuntu containers

Change-Id: I9ea89cd82d7ae6d71271ec59aac8cdf98bfca7c2
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>