conduit: Use new upstream delegation support

configuration/services/conduit.nix

@@ -18,6 +18,13 @@ in
       server_name = domain;
       database_backend = "rocksdb";
 
+      # Set up delegation: https://docs.conduit.rs/delegation.html#automatic-recommended
+      # This is primarily to make sliding sync work
+      well_known = {
+        client = "https://${domain}";
+        server = "${domain}:443";
+      };
+
       turn_uris =
         let
           address = "${config.services.coturn.realm}:${toString config.services.coturn.listening-port}";
@@ -230,19 +237,8 @@ in
           proxy_buffering off;
         '';
       };
-
+      "/.well-known/matrix" = {
-      # Add Element X support
+        proxyPass = "http://${cfg.settings.global.address}:${toString cfg.settings.global.port}";
-      # TODO(tlater): Remove when no longer required: https://github.com/vector-im/element-x-android/issues/1085
-      "=/.well-known/matrix/client" = {
-        alias = pkgs.writeText "well-known-matrix-client" (builtins.toJSON {
-          "m.homeserver".base_url = "https://${domain}";
-          "org.matrix.msc3575.proxy".url = "https://${domain}";
-        });
-
-        extraConfig = ''
-          default_type application/json;
-          add_header Access-Control-Allow-Origin "*";
-        '';
       };
     };
   };