Set validator classes to psalm-immutable

src/Validator/GenericValidator.php

@@ -21,6 +21,8 @@ use function str_replace;
 
 /**
  * GenericValidator validates strings as UUIDs of any variant
+ *
+ * @psalm-immutable
  */
 final class GenericValidator implements ValidatorInterface
 {
@@ -30,7 +32,6 @@ final class GenericValidator implements ValidatorInterface
     private const VALID_PATTERN = '^[0-9A-Fa-f]{8}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{4}-[0-9A-Fa-f]{12}$';
 
     /**
-     * @psalm-pure
      * @psalm-return non-empty-string
      * @psalm-suppress MoreSpecificReturnType we know that the retrieved `string` is never empty
      * @psalm-suppress LessSpecificReturnStatement we know that the retrieved `string` is never empty
@@ -40,9 +41,6 @@ final class GenericValidator implements ValidatorInterface
         return self::VALID_PATTERN;
     }
 
-    /**
-     * @psalm-pure
-     */
     public function validate(string $uuid): bool
     {
         $uuid = str_replace(['urn:', 'uuid:', 'URN:', 'UUID:', '{', '}'], '', $uuid);