emacs-packages: Remove cask from old emacs package infrastructure

pkgs/applications/editors/emacs-modes/cask/default.nix

@@ -1,54 +0,0 @@
-{ stdenv, fetchFromGitHub, emacs, python }:
-
-stdenv.mkDerivation rec {
-  version = "0.8.4";
-  name = "cask-${version}";
-
-  src = fetchFromGitHub {
-    owner = "cask";
-    repo = "cask";
-    rev = "v${version}";
-    sha256 = "1p37lq8xpyq0rc7phxgsw3b73h8vf9rkpa5959rb5k46w6ps9686";
-  };
-
-  buildInputs = [ emacs python ];
-
-  # byte-compiling emacs files automatically triggers cask's bootstrap
-  # mechanism, what we don't want.
-  dontBuild = true;
-
-  installPhase = ''
-    install -d "$out/share/emacs/site-lisp"
-    install cask*.el* "$out/share/emacs/site-lisp"
-
-    install -d "$out/bin"
-    install bin/cask "$out/bin"
-
-    # We also need to install cask's templates in order for 'cask
-    # init' to work properly.
-    install -d "$out/templates"
-    install templates/* "$out/templates"
-
-    # In order to work with cask's hard coded file paths (during bootstrap),
-    # we have to create these links.
-    ln -s "$out/share/emacs/site-lisp/"* "$out"
-
-    # This file disables cask's self-updating function.
-    touch "$out/.no-upgrade"
-  '';
-
-  meta = with stdenv.lib; {
-    description = "Project management tool for Emacs";
-    longDescription =
-      ''
-        Cask is a project management tool for Emacs that helps automate the
-        package development cycle; development, dependencies, testing,
-        building, packaging and more. Cask can also be used to manage
-        dependencies for your local Emacs configuration.
-      '';
-    homepage = https://github.com/cask/cask;
-    license = licenses.gpl3Plus;
-    platforms = platforms.all;
-    maintainers = [ ];
-  };
-}