minor #17476 [Validator] getRequiredOptions() is no longer used in the example (mdoutreluingne)

This PR was merged into the 6.1 branch.

Discussion
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[Validator] `getRequiredOptions()` is no longer used in the example

Following #17468

I forgot to delete the method `getRequiredOptions()` as it is no longer used in the example and I have also removed the ``@Annotation`` because it was also no longer used in the example.

Commits
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858cabc [Validator] Remove annotation

Author: OskarStark

validation/custom_constraint.rst

@@ -31,14 +31,14 @@ First you need to create a Constraint class and extend :class:`Symfony\\Componen
             public string $mode = 'strict';
         }
 
-Add ``@Annotation`` or ``#[\Attribute]`` to the constraint class if you want to
-use it as an annotation/attribute in other classes.
+Add ``#[\Attribute]`` to the constraint class if you want to
+use it as an attribute in other classes.
 
 .. versionadded:: 6.1
 
     The ``#[HasNamedArguments]`` attribute was introduced in Symfony 6.1.
 
-You can use ``#[HasNamedArguments]`` or ``getRequiredOptions()`` to make some constraint options required::
+You can use ``#[HasNamedArguments]`` to make some constraint options required::
 
     // src/Validator/ContainsAlphanumeric.php
     namespace App\Validator;