nginx – Remove “Via” response header from “ledge”

I have an Openresty web-server that is also working as caching server by using ledge. ledge is setting a “Via” response header that exposing the hostname of the server which is fqdn.

Via: 1.1 xyz.example.com

I have these in my openresty and ledge config:

more_clear_headers 'Server';
server_tokens off;

I would like to remove the “Via” response header completely. But unable to figure out how to do it on ledge 🙁