Remove old versionadded

Author: Nyholm

configuration.rst

@@ -644,10 +644,6 @@ their values by running:
     # run this command to show all the details for a specific env var:
     $ php bin/console debug:container --env-var=FOO
 
-.. versionadded:: 4.3
-
-    The option to debug environment variables was introduced in Symfony 4.3.
-
 .. _configuration-accessing-parameters:
 
 Accessing Configuration Parameters

configuration/secrets.rst

@@ -4,10 +4,6 @@
 How to Keep Sensitive Information Secret
 ========================================
 
-.. versionadded:: 4.4
-
-    The Secrets management was introduced in Symfony 4.4.
-
 :ref:`Environment variables <config-env-vars>` are the best way to store configuration
 that depends on where the application is run - for example, some API key that
 might be set to one value while developing locally and another value on production.