Removed remaining 4.x directives

Author: wouterj

forms.rst

@@ -783,10 +783,11 @@ option in the options field array::
 
     ->add('task', null, ['attr' => ['maxlength' => 4]])
 
-.. versionadded:: 4.3
+.. seealso::
 
-    Starting from Symfony 4.3, :doc:`Doctrine </doctrine>` metadata is introspected
-    to add :ref:`automatic validation constraints <automatic_object_validation>`.
+    Besides guessing the form type, Symfony also guesses `validation constraints <validating-forms>`_
+    if you're using a Doctrine entity. Read :ref:`automatic_object_validation`
+    guide for more information.
 
 Unmapped Fields
 ~~~~~~~~~~~~~~~

reference/configuration/framework.rst

@@ -1939,7 +1939,7 @@ Whether or not to enable the ``translator`` service in the service container.
 fallbacks
 .........
 
-**type**: ``string|array`` **default**: ``['en']``
+**type**: ``string|array`` **default**: value of `default_locale`_
 
 This option is used when the translation key for the current locale wasn't
 found.

translation.rst

@@ -411,12 +411,6 @@ checks translation resources for several locales:
             // ...
         ]);
 
-.. deprecated:: 4.4
-
-    In Symfony versions before 4.4, the ``fallbacks`` option was initialized to
-    ``en`` (English) when not configured explicitly. Starting from Symfony 4.4,
-    this option is initialized to the same value as the ``default_locale`` option.
-
 .. note::
 
     When Symfony can't find a translation in the given locale, it will