chore: drop email notification settings for admin changes (moving)

Removed app config section about email notification for admin changes.

Moving to User Configuration chapter.



Signed-off-by: Josh <[email protected]>

Author: joshtrichards

admin_manual/configuration_server/config_sample_php_parameters.rst

@@ -4244,17 +4244,3 @@ which are older then the number of days that is set for ``activity_expire_days``
 
 Before enabling this, read the warning in :ref:`label-activities-groupfolders`
 
-Settings app
-^^^^^^^^^^^^
-
-If an email address of a user is changed by an admin, then it triggers an email
-to the user that states "Your email address on URL was changed by an
-administrator.". In some cases this should not be triggered, because it was a
-normal maintenance change. To disable this specific email the appconfig option
-``disable_email.email_address_changed_by_admin`` can be set to ``yes``::
-
-	occ config:app:set settings disable_activity.email_address_changed_by_admin --value yes
-
-To disable this behaviour change it to any other value or delete the app config::
-
-	occ config:app:delete settings disable_activity.email_address_changed_by_admin