No Table Caption makes it impossible to delete Module

Problem/Motivation

Cron is failing on my site since Tablefield keeps erroring.

Steps to reproduce

Installed module, made entry with tablefield without table caption, deleted node with entry, cron now fails and I get a `Fields Pending Deletion` in the uninstall page so it's impossible to delete. When I run `ddev drush core:cron` I get ```TypeError: array_key_exists(): Argument #2 ($array) must be of type array, string given in array_key_exists() (line 181 of /var/www/html/web/modules/contrib/tablefield/src/Plugin/Field/FieldType/TablefieldItem.php).```

Proposed resolution

Make it so I can delete fields to uninstall module.

Remaining tasks

User interface changes

API changes

Data model changes