restructure: remove redundant file

lib/deploy.nix

@@ -1,76 +0,0 @@
-let
-  pkgs = import <nixpkgs> {};
-  lib = pkgs.lib;
-
-  hosts = import ../configuration/hosts;
-  nixosHosts = lib.filterAttrs (name: host: host ? ssh) hosts;
-
-  allGroups = lib.unique (
-    lib.flatten (
-      lib.mapAttrsToList (
-        name: host: host.groups
-      ) hosts
-    )
-  );
-
-  hostsInGroup = group: 
-    lib.filterAttrs (
-      k: v: builtins.elem group v.groups
-    ) hosts;
-
-  hostsInAllGroups = lib.listToAttrs (
-    map (
-      group: lib.nameValuePair group (
-        lib.attrNames (hostsInGroup group)
-      )
-    ) allGroups );
-
-  mkDeploy = hostnames: pkgs.writeScript "deploy-${lib.concatStringsSep "-" hostnames}" ''
-    #!${pkgs.stdenv.shell}
-    set -e -o pipefail
-    export PATH=/run/wrappers/bin/:${with pkgs; lib.makeBinPath [
-      coreutils
-      openssh
-      nix
-      gnutar
-      findutils
-      nettools
-      gzip
-      git
-    ]}
-
-    MODE=$1
-    shift || true
-    ARGS=$@
-
-    [ "$MODE" == "" ] && MODE="switch"
-
-    ${lib.concatMapStrings (hostname: let
-      hostAttrs = nixosHosts.${hostname};
-      nixosSystem = (import <nixpkgs/nixos/lib/eval-config.nix> {
-        modules = [
-          "${toString ../configuration}/hosts/${hostname}/configuration.nix"
-        ];
-        system = if hostAttrs ? system then hostAttrs.system else "x86_64-linux";
-      }).config.system.build.toplevel;
-    in ''
-      (
-        echo "deploying ${hostname}..."
-        nix copy --no-check-sigs -s --to ssh://${hostAttrs.ssh.host} ${nixosSystem}
-        ssh $NIX_SSHOPTS ${hostAttrs.ssh.host} "sudo nix-env -p /nix/var/nix/profiles/system -i ${nixosSystem}"
-        ssh $NIX_SSHOPTS ${hostAttrs.ssh.host} "sudo /nix/var/nix/profiles/system/bin/switch-to-configuration $MODE $ARGS"
-      ) &
-      PID_LIST+=" $!"
-    '') hostnames}
-
-    echo "deploys started, waiting for them to finish..."
-
-    trap "kill $PID_LIST" SIGINT
-    wait $PID_LIST
-  '';
-
-in {
-  deploy = (lib.mapAttrs (hostname: hostAttrs: mkDeploy [ hostname ]) nixosHosts) 
-  // (lib.mapAttrs (group: hosts: mkDeploy hosts) hostsInAllGroups)
-  // { all = mkDeploy (lib.attrNames nixosHosts); };
-}