minor #17312 Cleanup old versionadded directives (OskarStark)

This PR was merged into the 6.1 branch.

Discussion
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Cleanup old versionadded directives

Commits
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875662d Cleanup old versionadded directives

Author: OskarStark

.doctor-rst.yaml

@@ -88,7 +88,6 @@ whitelist:
         - '.. versionadded:: 1.11' # Messenger (Middleware / DoctrineBundle)
         - '.. versionadded:: 1.18' # Flex in setup/upgrade_minor.rst
         - '.. versionadded:: 1.0.0' # Encore
-        - '.. versionadded:: 5.1' # Private Services
         - '0 => 123' # assertion for var_dumper - components/var_dumper.rst
         - '1 => "foo"' # assertion for var_dumper - components/var_dumper.rst
         - '123,' # assertion for var_dumper - components/var_dumper.rst

reference/configuration/framework.rst

@@ -2733,10 +2733,6 @@ A map with default context options that will be used with each ``serialize`` and
 call. This can be used for example to set the json encoding behavior by setting ``json_encode_options``
 to a `json_encode flags bitmask`_.
 
-.. versionadded:: 5.4
-
-    The ``default_context`` parameter was introduced in Symfony 5.4.
-
 php_errors
 ~~~~~~~~~~