Update core 8.3.0

web/core/modules/rest/config/install/rest.settings.yml

@@ -1,7 +1,3 @@
-# Set the domain for REST type and relation links.
-# If left blank, the site's domain will be used.
-link_domain: ~
-
 # Before Drupal 8.2, EntityResource used permissions as well as the entity
 # access system for access checking. This was confusing, and it only did this
 # for historical reasons. New Drupal installations opt out from this by default

web/core/modules/rest/config/schema/rest.schema.yml

@@ -3,6 +3,7 @@ rest.settings:
   type: config_object
   label: 'REST settings'
   mapping:
+    # @deprecated in Drupal 8.3.x and will be removed before Drupal 9.0.0.
     link_domain:
       type: string
       label: 'Domain of the relation'