nginx(role): remove unnecessary hosts section from README

roles/nginx/README.md

@@ -43,10 +43,6 @@ None.
   Needs `nginx__use_custom_nginx_conf` to be set to true to work.  
   You should probably still make sure that your custom `nginx.conf` includes `/etc/nginx/conf.d/*.conf`, so that the other configuration files still work.
 
-## `hosts`
-
-The `hosts` for this role need to be the machines, for which you want to make sure the `nginx` package is installed from the NGINX repos and a desirable baseline of NGINX configs is deployed.
-
 ## Config Template
 
 Here's a config template, which can be used for new NGINX site configs, which you can supply to this role using the `nginx__configurations` argument.