Delete ScalarDB versions doc; update sidebar navigation

[josh-wong]

Description

This PR removes the ScalarDB versions doc from the repository and removes the doc from the sidebar navigation. The contents of the ScalarDB versions doc now exists in the Requirements doc.

Related issues and/or PRs

• AUTO: Docs repo sync - ScalarDL #583
• AUTO: Docs repo sync - ScalarDL #582
• AUTO: Docs repo sync - ScalarDL #581
• AUTO: Docs repo sync - ScalarDL #584

Changes made

• Deleted scalardb-versions.mdx.
• Removed scalardb-versions from the sidebar navigation.

Checklist

The following is a best-effort checklist. If any items in this checklist are not applicable to this PR or are dependent on other, unmerged PRs, please still mark the checkboxes after you have read and understood each item.

• I have updated the side navigation as necessary.
• I have commented my code, particularly in hard-to-understand areas.
• I have updated the documentation to reflect the changes.
• Any remaining open issues linked to this PR are documented and up-to-date (Jira, GitHub, etc.).
• My changes generate no new warnings.
• Any dependent changes in other PRs have been merged and published.

Additional notes (optional)

N/A