fix: duplicate

Author: loks0n

src/Http/Response.php

@@ -97,8 +97,6 @@ abstract class Response
     public const STATUS_CODE_REQUEST_HEADER_FIELDS_TOO_LARGE = 431;
     public const STATUS_CODE_UNAVAILABLE_FOR_LEGAL_REASONS = 451;
 
-    public const STATUS_CODE_UNAVAILABLE_FOR_LEGAL_REASONS = 451;
-
     public const STATUS_CODE_INTERNAL_SERVER_ERROR = 500;
     public const STATUS_CODE_NOT_IMPLEMENTED = 501;
     public const STATUS_CODE_BAD_GATEWAY = 502;