meta: Remove declarative containers

Because of how easy it is to create and run virtual machines in NixOS,
the use of containers is not necessary. Virtual machines additionally
outperform containers when it comes to graphical tasks, and allow for
the usage of a variety of GUI applications separate from the host.

configuration.nix

@@ -399,53 +399,5 @@
           HOLD: KEY_RIGHTMETA
   '';
 
-  containers.test = let hostCfg = config;
-  in {
-    autoStart = false;
-    privateNetwork = true;
-    hostAddress = "192.168.100.10";
-    localAddress = "192.168.100.11";
-
-    config = { config, pkgs, ... }: {
-      programs.fish.enable = true;
-      users.defaultUserShell = pkgs.fish;
-      environment.shells = with pkgs; [ fish ];
-
-      programs.npm.enable = true;
-
-      nix.package = pkgs.nixFlakes;
-      nix.settings.experimental-features = [ "nix-command" "flakes" ];
-      programs.neovim.enable = true;
-      environment.systemPackages = with pkgs; [
-        p7zip
-        kitty
-        git
-        unzip
-        ripgrep
-        gcc
-        trashy
-        wget
-        exa
-        fd
-        fzf
-        gdu
-        ranger
-      ];
-
-      environment.variables = { TERM = "xterm-kitty"; };
-
-      users.mutableUsers = false;
-      users.allowNoPasswordLogin = true;
-
-      users.users.user = {
-        isNormalUser = true;
-        home = "/home/user";
-      };
-
-      environment.defaultPackages = [ ];
-      system.stateVersion = "22.11";
-    };
-  };
-
   system.stateVersion = "22.11";
 }