Remove old xeon07 hostname in raccoon and tent ssh config

xeon07 has been renamed to hut in apex /etc/hosts

m/raccoon/configuration.nix

@@ -51,11 +51,13 @@
 
   # Configure Nvidia driver to use with CUDA
   hardware.nvidia.package = config.boot.kernelPackages.nvidiaPackages.production;
-  hardware.nvidia.open = false; # Maxwell is older than Turing architecture
   hardware.graphics.enable = true;
   nixpkgs.config.nvidia.acceptLicense = true;
   services.xserver.videoDrivers = [ "nvidia" ];
 
+  # Disable garbage collection for now
+  nix.gc.automatic = lib.mkForce false;
+
   services.openssh.settings.X11Forwarding = true;
 
   services.prometheus.exporters.node = {