remove adapter doctrine

Author: MrYamous

reference/configuration/framework.rst

@@ -2879,7 +2879,8 @@ app
 The cache adapter used by the ``cache.app`` service. The FrameworkBundle
 ships with multiple adapters: ``cache.adapter.apcu``, ``cache.adapter.system``,
 ``cache.adapter.filesystem``, ``cache.adapter.psr6``, ``cache.adapter.redis``,
-``cache.adapter.memcached`` and ``cache.adapter.pdo``.
+``cache.adapter.memcached``, ``cache.adapter.pdo`` and
+``cache.adapter.doctrine_dbal``.
 
 There's also a special adapter called ``cache.adapter.array`` which stores
 contents in memory using a PHP array and it's used to disable caching (mostly on