removing duplicate symfony/validator in require-dev

Author: weaverryan

composer.json

@@ -35,7 +35,6 @@
         "swiftmailer/swiftmailer": "^4.3 || ^5.0 || ^6.0",
         "symfony/console": "^2.8 || ^3.0 || ^4.0",
         "symfony/phpunit-bridge": "^2.8 || ^3.0 || ^4.0",
-        "symfony/validator": "^2.8 || ^3.0 || ^4.0",
         "symfony/yaml": "^2.8 || ^3.0 || ^4.0",
         "phpunit/phpunit": "^4.8.35|^5.4.3"
     },