Merge branch '6.3' into 6.4

* 6.3:
  remove reference to removed cache adapter
  remove Symfony 5 deprecations

Author: xabbuh

cache.rst

@@ -101,7 +101,6 @@ The Cache component comes with a series of adapters pre-configured:
 
 * :doc:`cache.adapter.apcu </components/cache/adapters/apcu_adapter>`
 * :doc:`cache.adapter.array </components/cache/adapters/array_cache_adapter>`
-* :doc:`cache.adapter.doctrine </components/cache/adapters/doctrine_adapter>` (deprecated)
 * :doc:`cache.adapter.doctrine_dbal </components/cache/adapters/doctrine_dbal_adapter>`
 * :doc:`cache.adapter.filesystem </components/cache/adapters/filesystem_adapter>`
 * :doc:`cache.adapter.memcached </components/cache/adapters/memcached_adapter>`

components/cache/adapters/pdo_adapter.rst

@@ -40,13 +40,6 @@ You can also create this table explicitly by calling the
 :method:`Symfony\\Component\\Cache\\Adapter\\PdoAdapter::createTable` method in
 your code.
 
-.. deprecated:: 5.4
-
-    Using :class:`Symfony\\Component\\Cache\\Adapter\\PdoAdapter` with a
-    :class:`Doctrine\\DBAL\\Connection` or a DBAL URL is deprecated since Symfony 5.4
-    and will be removed in Symfony 6.0.
-    Use :class:`Symfony\\Component\\Cache\\Adapter\\DoctrineDbalAdapter` instead.
-
 .. tip::
 
     When passed a `Data Source Name (DSN)`_ string (instead of a database connection