nixos/weechat: Drop user home directory configuration

Configuring an user home directory also enables several invocations and
mechanisms, e.g. SSH authorized_keys or bashrc, which is bad from a
security perspective. The service doesn't need that at all and the
environment is set up over different ways now. So drop it.

This doesn't change the current behaviour.

Signed-off-by: Felix Singer <felixsinger@posteo.net>

nixos/modules/services/misc/weechat.nix

@@ -37,9 +37,7 @@ in
     users = {
       groups.weechat = { };
       users.weechat = {
-        createHome = true;
         group = "weechat";
-        home = cfg.root;
         isSystemUser = true;
       };
     };