minor #11573 Remove obsolete .. role directives (OskarStark)

This PR was merged into the 3.4 branch.

Discussion
----------

Remove obsolete .. role directives

Refs https://github.com/orgs/symfony/teams/team-symfony-docs/discussions/6

<!--

If your pull request fixes a BUG, use the oldest maintained branch that contains
the bug (see https://symfony.com/roadmap for the list of maintained branches).

If your pull request documents a NEW FEATURE, use the same Symfony branch where
the feature was introduced (and `master` for features of unreleased versions).

-->

Commits
-------

d217392 Remove obsolete .. role directives

Author: OskarStark

contributing/code/core_team.rst

@@ -50,10 +50,6 @@ In addition, there are other groups created to manage specific topics:
 Active Core Members
 ~~~~~~~~~~~~~~~~~~~
 
-.. role:: leader
-.. role:: merger
-.. role:: decider
-
 * **Project Leader**:
 
   * **Fabien Potencier** (`fabpot`_).