Issue #2447555 by Cinnead: Unnecessary index on langcode and deleted column in...

Issue #2447555 by Cinnead: Unnecessary index on langcode and deleted column in dedicated field tables

core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php

@@ -1633,9 +1633,7 @@ protected function getDedicatedTableSchema(FieldStorageDefinitionInterface $stor
       'primary key' => array('entity_id', 'deleted', 'delta', 'langcode'),
       'indexes' => array(
         'bundle' => array('bundle'),
-        'deleted' => array('deleted'),
         'revision_id' => array('revision_id'),
-        'langcode' => array('langcode'),
       ),
     );
 

core/tests/Drupal/Tests/Core/Entity/Sql/SqlContentEntityStorageSchemaTest.php

@@ -854,9 +854,7 @@ public function testDedicatedTableSchema() {
         'primary key' => array('entity_id', 'deleted', 'delta', 'langcode'),
         'indexes' => array(
           'bundle' => array('bundle'),
-          'deleted' => array('deleted'),
           'revision_id' => array('revision_id'),
-          'langcode' => array('langcode'),
         ),
         'foreign keys' => array(
           $field_name . '_color' => array(
@@ -1001,9 +999,7 @@ public function testDedicatedTableSchemaForEntityWithStringIdentifier() {
         'primary key' => array('entity_id', 'deleted', 'delta', 'langcode'),
         'indexes' => array(
           'bundle' => array('bundle'),
-          'deleted' => array('deleted'),
           'revision_id' => array('revision_id'),
-          'langcode' => array('langcode'),
         ),
         'foreign keys' => array(
           $field_name . '_color' => array(