move the small per-service host options to deploy.<service>

nix/host-modules/hive-forge/service.nix

@@ -30,17 +30,6 @@ in
   # only one host runs it: `deploy.forgejo.enable`, in ../deploy.nix. What
   # follows is what every hive needs to reach it, wherever it runs.
   options.services.hyperhive.swarm.forge = {
-    httpPort = lib.mkOption {
-      type = lib.types.port;
-      default = 3000;
-      description = ''
-        TCP port the forge serves HTTP on. Default 3000 sits outside
-        hyperhive's claimed ranges (dashboard 7000, every agent in
-        8100..8999 via FNV-1a hash). Change this if you already have
-        another forgejo bound to 3000.
-      '';
-    };
-
     sshPort = lib.mkOption {
       type = lib.types.port;
       default = 2222;