removed VERSION file

[xh3b4sd]

abstract

This PR removes the VERSION file. Current idea is that deployable microservices should only be rolled forward in an automated fashion. Only libraries and APIs should provide semantic versioning.

checklist

• [x] Make sure you read and understood the CONTRIBUTING.md.
• [x] Make sure you applied sufficient labels, milestone and assignee.
• [x] Make sure all TODOs are addressed.
• [x] Make sure there is sufficient documentation.
• [x] Make sure there are sufficient tests.
• [x] Make sure all commits are squashed before merging.
• [x] Make sure to delete the feature branch after merging.