meta: Remove old osu container

No longer needed since I no longer intend to use nix-gaming. May add
another container later without it.

containers/default.nix

@@ -3,7 +3,6 @@
     ./dev.nix
     ./gui.nix
     ./obsidian.nix
-    ./osu.nix
     ./rar.nix
     ./srb2.nix
     ./wine.nix

containers/osu.nix

@@ -1,78 +0,0 @@
-{ home-manager, stylix, nix-gaming, ... }:
-let
-  VARIABLES = import ../src/variables.nix;
-in
-{
-  containers.osu = {
-    privateNetwork = true;
-    ephemeral = true;
-
-    bindMounts = {
-      "/home/user/.osu" = {
-        hostPath = "/home/${VARIABLES.username}/containers/osu";
-        isReadOnly = false;
-      };
-
-      waylandDisplay = rec {
-        hostPath = "/run/user/1000";
-        mountPoint = hostPath;
-      };
-
-      x11Display = rec {
-        hostPath = "/tmp/.X11-unix";
-        mountPoint = hostPath;
-        isReadOnly = true;
-      };
-
-      dri = rec {
-        hostPath = "/dev/dri";
-        mountPoint = hostPath;
-      };
-    };
-
-    allowedDevices = [
-      {
-        modifier = "rw";
-        node = "/dev/dri/renderD128";
-      }
-    ];
-
-    config = { pkgs, ... }: {
-      imports = [
-        home-manager.nixosModules.home-manager
-        stylix.nixosModules.stylix
-        nix-gaming.nixosModules.pipewireLowLatency
-        ./common/wayland.nix
-        ../modules/fonts.nix
-        ../modules/stylix.nix
-        ../modules/pipewire.nix
-      ];
-
-      environment.systemPackages = with pkgs; [
-        nix-gaming.packages."${VARIABLES.system}".osu-stable
-        kitty
-      ];
-
-      users = {
-        mutableUsers = false;
-        allowNoPasswordLogin = true;
-
-        users.user = {
-          isNormalUser = true;
-          home = "/home/user";
-        };
-      };
-
-      home-manager.users.user = { ... }: {
-        home.stateVersion = VARIABLES.stateVersion;
-      };
-
-      environment = {
-        variables = { TERM = "xterm-kitty"; };
-        defaultPackages = [ ];
-      };
-
-      system.stateVersion = VARIABLES.stateVersion;
-    };
-  };
-}