diff -u b/core/modules/field/field.crud.inc b/core/modules/field/field.crud.inc
--- b/core/modules/field/field.crud.inc
+++ b/core/modules/field/field.crud.inc
@@ -161,7 +161,7 @@
 
   // Merge deleted fields (stored in state) if needed.
   if ($include_deleted) {
-    $deleted_fields = \Drupal::state()->get('field.field.deleted') ?: array();
+    $deleted_fields = Drupal::state()->get('field.field.deleted') ?: array();
     foreach ($deleted_fields as $id => $config) {
       $fields[$id] = entity_create('field_entity', $config);
     }
@@ -360,7 +360,7 @@
 
   // Merge deleted instances (stored in state) if needed.
   if ($include_deleted) {
-    $state = \Drupal::state();
+    $state = Drupal::state();
     $deleted_fields = $state->get('field.field.deleted');
     $deleted_instances = $state->get('field.instance.deleted') ?: array();
     foreach ($deleted_instances as $id => $config) {
@@ -581,7 +581,7 @@
   }
 
   // Retrieve all deleted fields. Any that have no instances can be purged.
-  $deleted_fields = \Drupal::state()->get('field.field.deleted') ?: array();
+  $deleted_fields = Drupal::state()->get('field.field.deleted') ?: array();
   foreach ($deleted_fields as $field) {
     $field = new Field($field);
     $instances = field_read_instances(array('field_id' => $field['uuid']), array('include_deleted' => 1));
@@ -635,7 +635,7 @@
   $field = field_info_field_by_id($instance['field_id']);
   module_invoke($field['storage']['module'], 'field_storage_purge_instance', $instance);
 
-  $state = \Drupal::state();
+  $state = Drupal::state();
   $deleted_instances = $state->get('field.instance.deleted');
   unset($deleted_instances[$instance['uuid']]);
   $state->set('field.instance.deleted', $deleted_instances);
@@ -662,7 +662,7 @@
     throw new FieldException(t('Attempt to purge a field @field_name that still has instances.', array('@field_name' => $field['field_name'])));
   }
 
-  $state = \Drupal::state();
+  $state = Drupal::state();
   $deleted_fields = $state->get('field.field.deleted');
   unset($deleted_fields[$field['uuid']]);
   $state->set('field.field.deleted', $deleted_fields);
diff -u b/core/modules/field/field.install b/core/modules/field/field.install
--- b/core/modules/field/field.install
+++ b/core/modules/field/field.install
@@ -356,7 +356,7 @@
   $uuid = new Uuid();
   $manifest_ids = array('fields' => array(), 'instances' => array());
 
-  $state = \Drupal::state();
+  $state = Drupal::state();
   $deleted_fields = $state->get('field.field.deleted') ?: array();
   $deleted_instances = $state->get('field.instance.deleted') ?: array();
 
@@ -396,7 +396,7 @@
 
     // Save in either config or state.
     if (!$record['deleted']) {
-      \Drupal::config('field.field.' . $config['id'])
+      Drupal::config('field.field.' . $config['id'])
         ->setData($config)
         ->save();
       $manifest_ids['fields'][] = $config['id'];
@@ -449,7 +449,7 @@
 
     // Save in either config or state.
     if (!$record['deleted']) {
-      \Drupal::config('field.instance.' . $config['id'])
+      Drupal::config('field.instance.' . $config['id'])
         ->setData($config)
         ->save();
       $manifest_ids['instances'][] = $config['id'];
diff -u b/core/modules/field/field.module b/core/modules/field/field.module
--- b/core/modules/field/field.module
+++ b/core/modules/field/field.module
@@ -530,13 +530,13 @@
  * Refreshes the 'active' and 'storage[active]' values for fields.
  */
 function field_sync_field_status() {
-  $module_handler = \Drupal::moduleHandler();
-  $state = \Drupal::state();
+  $module_handler = Drupal::moduleHandler();
+  $state = Drupal::state();
 
   // Get both deleted and non-deleted field definitions.
   $fields = array();
   foreach (config_get_storage_names_with_prefix('field.field') as $name) {
-    $field = \Drupal::config($name)->get();
+    $field = Drupal::config($name)->get();
     $fields[$field['uuid']] = $field;
   }
   $deleted_fields = $state->get('field.field.deleted') ?: array();
@@ -591,7 +591,7 @@
       $deleted_fields[$uuid] = $field;
     }
     else {
-      \Drupal::config('field.field.' . $field['id'])
+      Drupal::config('field.field.' . $field['id'])
         ->set('module', $field['module'])
         ->set('active', $field['active'])
         ->set('storage.module', $field['storage']['module'])
diff -u b/core/modules/field_sql_storage/field_sql_storage.install b/core/modules/field_sql_storage/field_sql_storage.install
--- b/core/modules/field_sql_storage/field_sql_storage.install
+++ b/core/modules/field_sql_storage/field_sql_storage.install
@@ -20,7 +20,7 @@
   foreach (config_get_storage_names_with_prefix('field.field') as $name) {
     $fields[] = config($name)->get();
   }
-  $deleted_fields = \Drupal::state()->get('field.field.deleted') ?: array();
+  $deleted_fields = Drupal::state()->get('field.field.deleted') ?: array();
   $fields = array_merge($fields, $deleted_fields);
 
   foreach ($fields as $field) {
@@ -105,7 +105,7 @@
 function field_sql_storage_update_8000(&$sandbox) {
   // Get field definitions from config, and deleted fields from state().
   $config_names = config_get_storage_names_with_prefix('field.field');
-  $deleted_fields = \Drupal::state()->get('field.field.deleted') ?: array();
+  $deleted_fields = Drupal::state()->get('field.field.deleted') ?: array();
   // Ditch UUID keys, we will iterate through deleted fields using a numeric
   // index.
   $deleted_fields = array_values($deleted_fields);