quagga: remove

Upstream repositories do no longer exists. There has been no release in
a while. - Not a good combination for a network daemon running as root
in C that parses network packets...

pkgs/top-level/all-packages.nix

@@ -19135,8 +19135,6 @@ in
 
   qremotecontrol-server = callPackage ../servers/misc/qremotecontrol-server { };
 
-  quagga = callPackage ../servers/quagga { };
-
   rabbitmq-server = callPackage ../servers/amqp/rabbitmq-server {
     inherit (darwin.apple_sdk.frameworks) AppKit Carbon Cocoa;
     elixir = beam_nox.interpreters.elixir_1_8;