Removed an unused link

Author: javiereguiluz

doctrine.rst

@@ -831,7 +831,6 @@ Learn more
 .. _`Doctrine Query Language`: http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/dql-doctrine-query-language.html
 .. _`Reserved SQL keywords documentation`: http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/basic-mapping.html#quoting-reserved-words
 .. _`DoctrineMongoDBBundle docs`: https://symfony.com/doc/current/bundles/DoctrineMongoDBBundle/index.html
-.. _`DoctrineFixturesBundle`: https://symfony.com/doc/current/bundles/DoctrineFixturesBundle/index.html
 .. _`Transactions and Concurrency`: http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/transactions-and-concurrency.html
 .. _`DoctrineMigrationsBundle`: https://github.com/doctrine/DoctrineMigrationsBundle
 .. _`NativeQuery`: http://docs.doctrine-project.org/projects/doctrine-orm/en/latest/reference/native-sql.html