remove node holders and general repo cleanup

the node holders were just causing issues, we have no need for them currently, so we can just set the secure proxy URL through FORWARD_DESTINATION. less complexity for the cluster and self-hosters too

proxy/src/secure.rs

@@ -1,5 +1,4 @@
-use proxy::edge_node_dc_callback;
-use proxy_common::{ProxyStartupParam, setup_edge_node_connection};
+use proxy_common::ProxyStartupParam;
 use rnex_server::with_setup;
 
 #[tokio::main]
@@ -8,7 +7,7 @@ async fn main() {
         let param = ProxyStartupParam::new(proxy_common::ProxyType::Secure)
             .expect("unable to get startup parameters");
 
-        setup_edge_node_connection(&param, edge_node_dc_callback).await;
+        // setup_edge_node_connection(&param, edge_node_dc_callback).await;
         proxy::start_secure(param).await;
         Ok(())
     })