schalter: remove

it's still running openwrt

flake.nix

@@ -308,39 +308,6 @@
           system = "aarch64-linux";
         };
 
-        schalter = nixosSystem' {
-          modules = [
-            "${inputs.nixpkgs}/nixos/modules/installer/sd-card/sd-image-raspberrypi.nix"
-            ({ lib, ... }: {
-              networking.hostName = "schalter";
-              hardware.enableRedistributableFirmware = true;
-              #networking.wireless.enable = true;
-              powerManagement.cpuFreqGovernor = lib.mkDefault "performance";
-
-              boot = {
-                loader = {
-                  grub.enable = false;
-                  raspberryPi = {
-                    enable = true;
-                    version = 1;
-                    uboot.enable = true;
-                  };
-                };
-                # supportedFilesystems = lib.mkForce [ "vfat" "ext4" ];
-
-                tmpOnTmpfs = true;
-              };
-              sdImage = {
-                compressImage = false;
-                imageBaseName = "schalter";
-                firmwareSize = 512;
-              };
-
-            })
-          ];
-          system = "armv6l-linux";
-        };
-
         matemat = nixosSystem' {
           modules = [
             ./config/lxc-container.nix