Remove unused heading from 6.2 upgrade notes

docs/releases/6.2.md

@@ -276,8 +276,6 @@ INSTALLED_APPS = [
 
 For more details, see [](custom_userviewset).
 
-## Upgrade considerations - deprecation of old functionality
-
 ## Upgrade considerations - changes affecting Wagtail customisations
 
 ### Changes to report views with the new Universal Listings UI