qemu-x86_64: Delete device

It's being replaced by the generic uefi-x86_64 device.

Basically, replace the QEMU-specific system type by the totally standard
UEFI system type. This way we're dogfooding it way better!

devices/qemu-x86_64/default.nix

@@ -1,63 +0,0 @@
-{ config, lib, pkgs, ... }:
-
-{
-  mobile.device.name = "qemu-x86_64";
-  mobile.device.identity = {
-   name = "(x86_64)";
-   manufacturer = "QEMU";
-  };
-
-  mobile.hardware = {
-    soc = "generic-x86_64";
-
-    # For the QEMU device, this *sets* the display size.
-    screen = {
-      width = 1080;
-      height = 1920;
-    };
-    ram = 1024 * 2;
-  };
-
-  boot.kernelParams = [
-    "console=tty1"
-    "console=ttyS0"
-    "vt.global_cursor_default=0"
-    "quiet"
-  ];
-
-  mobile.system.type = "qemu-startscript";
-
-  mobile.boot.stage-1 = {
-    kernel = {
-      package = pkgs.linuxPackages_5_4.kernel;
-      modular = true;
-      modules = [
-        # Disk images
-        "ata_piix"
-        "sd_mod"
-
-        # Networking
-        "e1000"
-
-        # Keyboard
-        "hid_generic"
-        "pcips2" "atkbd" "i8042"
-
-        # Mouse
-        "mousedev"
-
-        # Input within X11
-        "uinput" "evdev"
-
-        # USB
-        "usbcore" "usbhid" "ehci_pci" "ehci_hcd"
-
-        # x86 RTC needed by the stage 2 init script.
-        "rtc_cmos"
-
-        # Video
-        "bochs_drm"
-      ];
-    };
-  };
-}

doc/boot_process.adoc

@@ -65,6 +65,6 @@ keys are held, it will instead show the recovery menu.
 The simulator can be launched using the following commands:
 
 ....
- $ nix-build --argstr device qemu-x86_64 -A pkgs.boot-recovery-menu-simulator
+ $ nix-build --argstr device uefi-x86_64 -A pkgs.boot-recovery-menu-simulator
  $ result/bin/simulator --resolution 1080x1920
 ....

examples/testing/crash-before-switch-root/default.nix

@@ -1,4 +1,4 @@
-{ device ? "qemu-x86_64" }:
+{ device ? "uefi-x86_64" }:
 let
   system-build = import ../../../. {
     inherit device;

modules/system-types.nix

@@ -12,7 +12,6 @@ in
 {
   imports = [
     ./system-types/depthcharge
-    ./system-types/qemu-startscript
     ./system-types/android
     ./system-types/u-boot
     ./system-types/uefi

modules/system-types/qemu-startscript/default.nix

@@ -1,63 +0,0 @@
-{ config, pkgs, lib, ... }:
-
-let
-  inherit (config.mobile) device hardware;
-  rootfs = config.system.build.rootfs;
-  enabled = config.mobile.system.type == "qemu-startscript";
-
-  qemu-startscript = pkgs.callPackage ./qemu-startscript-build.nix {
-    inherit (device) name;
-    inherit (hardware) ram;
-    initrd = config.system.build.initrd;
-    cmdline = lib.concatStringsSep " " config.boot.kernelParams;
-    kernel = config.mobile.boot.stage-1.kernel.package;
-  };
-
-  system = pkgs.linkFarm "${device.name}-build" [
-    {
-      name = "qemu-startscript";
-      path = "qemu-startscript";
-    }
-    {
-      name = "system";
-      path = rootfs;
-    }
-  ];
-
-  xres = toString hardware.screen.width;
-  yres = toString hardware.screen.height;
-in
-  {
-    config = lib.mkMerge [
-      { mobile.system.types = [ "qemu-startscript" ]; }
-
-      (lib.mkIf enabled {
-        system.build = rec {
-          inherit system;
-          default = vm;
-          vm = pkgs.writeScript "run-vm-${device.name}" ''
-            #!${pkgs.runtimeShell}
-            PS4=" $ "
-            set -eux
-
-            cp -f ${rootfs}/*.img fs.img
-            chmod +rw fs.img
-
-            qemu-system-x86_64 \
-              -enable-kvm \
-              -kernel "${qemu-startscript}/kernel" \
-              -initrd "${qemu-startscript}/initrd" \
-              -append "$(cat "${qemu-startscript}/cmdline.txt")" \
-              -m      "$(cat "${qemu-startscript}/ram.txt")M" \
-              -serial "mon:stdio" \
-              -drive  "file=fs.img,format=raw" \
-              -device VGA,edid=on,xres=${xres},yres=${yres} \
-              -device "e1000,netdev=net0" \
-              -device usb-ehci -device usb-kbd \
-              -device "usb-tablet" \
-              -netdev "user,id=net0,hostfwd=tcp::2222-:22,hostfwd=tcp::2323-:23,net=172.16.42.0/24,dhcpstart=172.16.42.1"
-          '';
-        };
-      })
-    ];
-  }

modules/system-types/qemu-startscript/qemu-startscript-build.nix

@@ -1,14 +0,0 @@
-{ runCommandNoCC
-, name
-, initrd
-, ram
-, cmdline
-, kernel
-}:
-runCommandNoCC "mobile-nixos_${name}-qemu-startscript" {} ''
-  mkdir -p $out/
-  cp ${kernel}/*Image* $out/kernel
-  cp ${initrd} $out/initrd
-  echo -n "${cmdline}" > $out/cmdline.txt
-  echo -n "${toString ram}" > $out/ram.txt
-''

release.nix

@@ -142,7 +142,7 @@ in
 
     constituents =
       lib.optionals (hasSystem "x86_64-linux") [
-        device.qemu-x86_64.x86_64-linux              # VM
+        device.uefi-x86_64.x86_64-linux              # UEFI system
         # Cross builds
         device.asus-z00t.x86_64-linux                # Android
         device.asus-dumo.x86_64-linux                # Depthcharge