Remove notice about relocation of docs from Javadoc index page

[josh-wong]

Description

This PR removes the notice about the relocation of docs from the Javadoc index page. The notice shouldn't have been added to that page since it's actively hosted on GitHub.

Related issues and/or PRs

• Add notice about the relocation of docs #53

Changes made

• Removed notice from the Javadoc index page.

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 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.).
• Tests (unit, integration, etc.) have been added for the changes.
• My changes generate no new warnings.
• Any dependent changes in other PRs have been merged and published.

Additional notes (optional)

N/A

Release notes

N/A

[kota2and3kan]

LGTM! Thank you!