Merge branch '456273-remove-custom-permissions-data' into 'master'

Remove unused custom_permissions data

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/153201



Merged-by: Scott Hampton <shampton@gitlab.com>
Approved-by: Alex Buijs <abuijs@gitlab.com>
Approved-by: Pedro Pombeiro <noreply@pedro.pombei.ro>
Approved-by: Scott Hampton <shampton@gitlab.com>
Co-authored-by: Daniel Tian <dtian@gitlab.com>