minor #17654 [DependencyInjection] 6.0 [autowiring] remove mention to @required (alexislefebvre)

This PR was merged into the 6.0 branch.

Discussion
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[DependencyInjection] 6.0 [autowiring] remove mention to `@required`

Symfony 6+ requires PHP 8, so `#[Required]` can be used in all cases, and mentioning ``@required`` doesn't add any value.

Commits
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e891e95 remove mention to `@required`

Author: javiereguiluz

service_container/autowiring.rst

@@ -578,11 +578,8 @@ Autowiring will automatically call *any* method with the ``#[Required]`` attribu
 above it, autowiring each argument. If you need to manually wire some of the arguments
 to a method, you can always explicitly :doc:`configure the method call </service_container/calls>`.
 
-If your PHP version doesn't support attributes (they were introduced in PHP 8),
-you can use the ``@required`` annotation instead.
-
 Despite property injection having some :ref:`drawbacks <property-injection>`,
-autowiring with ``#[Required]`` or ``@required`` can also be applied to public
+autowiring with ``#[Required]`` can also be applied to public
 typed properties:
 
 .. configuration-block::