Update to drupal-org-drupal 8.0.0-rc2. For more information, see https://www.drupal.org/node/2598668

core/profiles/standard/config/install/field.field.node.article.field_image.yml

@@ -17,7 +17,7 @@ translatable: true
 default_value: {  }
 default_value_callback: ''
 settings:
-  file_directory: field/image
+  file_directory: '[date:custom:Y]-[date:custom:m]'
   file_extensions: 'png gif jpg jpeg'
   max_filesize: ''
   max_resolution: ''

core/profiles/standard/config/install/field.field.user.user.user_picture.yml

@@ -18,7 +18,7 @@ default_value: {  }
 default_value_callback: ''
 settings:
   file_extensions: 'png gif jpg jpeg'
-  file_directory: pictures
+  file_directory: 'pictures/[date:custom:Y]-[date:custom:m]'
   max_filesize: '30 KB'
   alt_field: false
   title_field: false

core/profiles/standard/standard.install

@@ -4,7 +4,6 @@
  * Install, update and uninstall functions for the standard installation profile.
  */
 
-use Drupal\comment\Plugin\Field\FieldType\CommentItemInterface;
 use Drupal\user\Entity\User;
 use Drupal\user\RoleInterface;