Remove misleading paragraph about the Legacy URL API
As far as I could tell, the Legacy URL API is in fact deprecated, see Legacy URL API and DEP0116.
Checklist
✓ documentation is changed or added ✓ commit message follows commit guidelines
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
As far as I could tell, the Legacy URL API is in fact deprecated, see Legacy URL API and DEP0116.
✓ documentation is changed or added ✓ commit message follows commit guidelines