emacs-packages: Remove gh from old emacs package infrastructure

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

@@ -1,31 +0,0 @@
-{ stdenv, fetchgit, emacs, pcache, logito }:
-
-stdenv.mkDerivation rec {
-  name = "gh-0.5.3";
-
-  src = fetchgit {
-    url = "https://github.com/sigma/gh.el.git";
-    rev = "ef03b63d063ec22f03af449aa955c98dfad7f80e";
-    sha256 = "1pciq16vl5l4kvj08q4ib1jzk2bb2y1makcsyaw8k9jblqviw756";
-  };
-
-  buildInputs = [ emacs ];
-  propagatedUserEnvPkgs = [ pcache logito ];
-
-  patchPhase = ''
-    sed -i Makefile \
-      -e "s|^ *EFLAGS *=|& -L ${pcache}/share/emacs/site-lisp -L ${logito}/share/emacs/site-lisp --eval '(setq user-emacs-directory \"./\")'|" \
-      -e "s|/usr/local|$out|" \
-      -e "s|/site-lisp/\$(PKGNAME)|/site-lisp|"
-  '';
-
-  buildPhase = "make lisp";
-
-  meta = {
-    description = "A (very early) GitHub client library for Emacs";
-    homepage = https://github.com/sigma/gh.el;
-    license = stdenv.lib.licenses.gpl2Plus;
-
-    platforms = stdenv.lib.platforms.all;
-  };
-}