Drop support for symfony/validato

Author: odan

README.md

@@ -297,81 +297,6 @@ Please note: The `CakeValidationFactory` should be injected via constructor.
 
 **Read more:** <https://odan.github.io/2020/10/18/slim4-cakephp-validation.html>
 
-### Symfony Validator
-
-**Installation**
-
-```
-composer require symfony/validator
-```
-
-**Usage**
-
-```php
-<?php
-
-use Selective\Validation\Converter\SymfonyValidationConverter;
-use Selective\Validation\Exception\ValidationException;
-use Selective\Validation\Regex\ValidationRegex;
-use Symfony\Component\Validator\Constraints as Assert;
-use Symfony\Component\Validator\Validation;
-
-// Note: This is just an example. Don't use the $request object within the domain layer.
-$formData = (array)$request->getParsedBody();
-
-// ...
-
-// Create a Symfony validator instance
-$validator = Validation::createValidator();
-
-// Add rules
-$constraint = new Assert\Collection(
-    [
-        'first_name' => new Assert\NotBlank(['message' => 'Input required']),
-        'last_name' => new Assert\NotBlank(['message' => 'Input required']),
-        'mobile' => new Assert\Optional(
-            [
-                new Assert\Regex(
-                    [
-                        'pattern' => ValidationRegex::PHONE_NUMBER,
-                        'message' => 'Invalid',
-                    ]
-                ),
-            ]
-        ),
-        'comment' => new Assert\Optional(
-            [
-                new Assert\Length(['max' => 255, 'maxMessage' => 'Too long']),
-            ]
-        ),
-        'email' => new Assert\Optional(
-            [
-                new Assert\Email(
-                    [
-                        'message' => 'Invalid',
-                    ]
-                ),
-            ]
-        )
-    ]
-);
-
-$constraint->missingFieldsMessage = 'Input required';
-$violations = $validator->validate($formData, $constraint);
-
-// Convert symfony violations to ValidationResult
-$validationResult = SymfonyValidationConverter::createValidationResult($violations);
-
-// Optional: Do more complex validation and append it to the validation result
-if ($this->existsUsername($formData['username'])) {
-    $validationResult->addError('username', 'Username is already taken');
-}
-
-if ($validationResult->fails()) {
-    throw new ValidationException('Please check your input', $validationResult);
-}
-```
-
 ## Transformer
 
 If you want to implement a custom response data structure, 

composer.json

@@ -26,8 +26,7 @@
         "phpunit/phpunit": "^8 || ^9",
         "relay/relay": "^2.0",
         "slim/psr7": "^1",
-        "squizlabs/php_codesniffer": "^3.5",
-        "symfony/validator": "^5.1"
+        "squizlabs/php_codesniffer": "^3.5"
     },
     "scripts": {
         "check": [