Slightly modify DB migration template.

util/doctrine_migration.php.tmpl

@@ -5,7 +5,6 @@ declare(strict_types=1);
 namespace <namespace>;
 
 use Doctrine\DBAL\Schema\Schema;
-use App\Entity\Migrations\AbstractMigration;
 
 final class <className> extends AbstractMigration
 {
@@ -16,12 +15,12 @@ final class <className> extends AbstractMigration
 
     public function up(Schema $schema): void
     {
-        <up>
+<up>
     }
 
     public function down(Schema $schema): void
     {
-        <down>
+<down>
     }
-    <override>
+<override>
 }