clightning-plugins: remove unmaintained plugins prometheus & helpme

modules/clightning-plugins/default.nix

@@ -4,7 +4,6 @@ with lib;
 let
   options.services.clightning.plugins = {
     currencyrate.enable = mkEnableOption "Currencyrate (clightning plugin)";
-    helpme.enable = mkEnableOption "Help me (clightning plugin)";
     monitor.enable = mkEnableOption "Monitor (clightning plugin)";
     rebalance.enable = mkEnableOption "Rebalance (clightning plugin)";
   };
@@ -15,7 +14,6 @@ in {
   imports = [
     ./clboss.nix
     ./feeadjuster.nix
-    ./prometheus.nix
     ./summary.nix
     ./trustedcoin.nix
     ./zmq.nix
@@ -26,7 +24,6 @@ in {
   config = {
     services.clightning.extraConfig = mkMerge [
       (mkIf cfg.currencyrate.enable "plugin=${pluginPkgs.currencyrate.path}")
-      (mkIf cfg.helpme.enable "plugin=${pluginPkgs.helpme.path}")
       (mkIf cfg.monitor.enable "plugin=${pluginPkgs.monitor.path}")
       (mkIf cfg.rebalance.enable "plugin=${pluginPkgs.rebalance.path}")
     ];