[TASK] styleguide: Remove all type=link sql field definitions

https://github.com/TYPO3-CMS/styleguide/pull/445

We're adding core code to add default sql definitions derived from TCA.
Fields of type=link do not need to be set anymore.

See: https://review.typo3.org/c/Packages/TYPO3.CMS/+/81427

Releases: main
Related: https://forge.typo3.org/issues/102168