Remove notebook version notice

[maddenp-cu]

Synopsis

Now that we've got automated testing for the notebooks, the last-tested-version notices are probably less useful than they were initially, and yet less since we are not updating them regularly. This PR removes them

Type

• Tooling (CI, code-quality, packaging, revision-control, etc.)
• Notebooks

Impact

• This is a non-breaking change (existing functionality continues to work as expected)

Checklist

• I have added myself and any co-authors to the PR's Assignees list.
• I have reviewed the documentation and have made any updates necessitated by this change.
• Where helpful, I have written comments in this PR's Files changed view to assist reviewers.