fix: Remove unused build step from camera simulator

[brian-intel]

PR Checklist

• [ ] Added label to the Pull Request for easier discoverability and search
• [ ] Commit Message meets guidelines as indicated in the URL https://github.com/intel-retail/automated-self-checkout/blob/main/CONTRIBUTING.md
• [ ] Every commit is a single defect fix and does not mix feature addition or changes
• [ ] Unit Tests have been added for new changes
• [ ] Updated Documentation as relevant to the changes
• [ ] All commented code has been removed
• [ ] If you've added a dependency, you've ensured license is compatible with repository license and clearly outlined the added dependency.
• [ ] PR change contains code related to security
• [ ] PR introduces changes that breaks compatibility with other modules (If YES, please provide details below)

What are you changing?

Remove the build process from the docker compose file.

Issue this PR will close

close: #568

Anything the reviewer should know when reviewing this PR?

Test Instructions if applicable

1. make run-demo
2. notice that the camera-simulator0 build is no longer there and a docker pull image is only used
3. see demo is running

If the there are associated PRs in other repositories, please link them here (i.e. intel-retail/automated-self-checkout )