nixos/taskserver: Remove client.cert option

The option is solely for debugging purposes (particularly the unit tests
of the project itself) and doesn't make sense to include it in the NixOS
module options.

If people want to use this, we might want to introduce another option so
that we can insert arbitrary configuration lines.

Signed-off-by: aszlig <aszlig@redmoonstudios.org>

nixos/modules/services/misc/taskserver/default.nix

@@ -38,7 +38,6 @@ let
     ${mkConfLine "request.limit" cfg.requestLimit}
 
     # client
-    ${mkConfLine "client.cert" cfg.client.cert}
     ${mkConfLine "client.allow" cfg.allowedClientIDs}
     ${mkConfLine "client.deny" cfg.disallowedClientIDs}
 
@@ -226,15 +225,6 @@ in {
         '';
       };
 
-      client.cert = mkOption {
-        type = types.nullOr types.path;
-        default = null;
-        description = ''
-          Fully qualified path of the client cert. This is used by the
-          <command>client</command> command.
-        '';
-      };
-
       server = {
         host = mkOption {
           type = types.str;