remove swiftmailer

Author: AlexzPurewoko

src/Illuminate/Mail/composer.json

@@ -13,7 +13,6 @@
         "illuminate/log": "4.2.*",
         "illuminate/support": "4.2.*",
         "illuminate/view": "4.2.*",
-        "swiftmailer/swiftmailer": "^6.0",
         "symfony/mailer": "^6.4"
     },
     "require-dev": {