Bump @tootallnate/once and @wordpress/scripts in /block

Removes [@tootallnate/once](https://github.com/TooTallNate/once). It's no longer used after updating ancestor dependency [@wordpress/scripts](https://github.com/WordPress/gutenberg/tree/HEAD/packages/scripts). These dependencies need to be updated together.


Removes `@tootallnate/once`

Updates `@wordpress/scripts` from 30.4.0 to 31.6.0
- [Release notes](https://github.com/WordPress/gutenberg/releases)
- [Changelog](https://github.com/WordPress/gutenberg/blob/trunk/packages/scripts/CHANGELOG.md)
- [Commits](https://github.com/WordPress/gutenberg/commits/@wordpress/scripts@31.6.0/packages/scripts)

---
updated-dependencies:
- dependency-name: "@tootallnate/once"
  dependency-version: 
  dependency-type: indirect
- dependency-name: "@wordpress/scripts"
  dependency-version: 31.6.0
  dependency-type: direct:development
...

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Author: dependabot[bot]