bug #12168 Remove duplicate namespace in code example (OskarStark)

This PR was merged into the 4.3 branch.

Discussion
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Remove duplicate namespace in code example

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Commits
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9ca5687 Remove duplicate namespace in code example

Author: OskarStark

workflow.rst

@@ -664,7 +664,6 @@ Then you can access this metadata in your controller as follows::
 
     use App\Entity\BlogPost;
     use Symfony\Component\Workflow\Registry;
-    use App\Entity\BlogPost;
 
     public function myController(Registry $registry, BlogPost $post)
     {