- Removed getallheaders() polyfill

composer.json

@@ -21,7 +21,6 @@
         "laminas/laminas-httphandlerrunner": "2.5.x-dev",
         "vlucas/phpdotenv": "^3.4@dev",
         "middlewares/whoops": "dev-master",
-        "ralouphie/getallheaders": "^3@dev",
         "guzzlehttp/guzzle": "^7@dev",
         "swiftmailer/swiftmailer": "^6.2@dev",
         "mcnd/storage": "dev-master",