Remove editline expression, not needed anymore

editline.nix

-{ stdenv, fetchFromGitHub, autoreconfHook }:
-
-stdenv.mkDerivation rec {
-  name = "editline-${version}";
-  version = "1.16.0";
-  src = fetchFromGitHub {
-    owner = "troglobit";
-    repo = "editline";
-    rev = version;
-    sha256 = "0a751dp34mk9hwv59ss447csknpm5i5cgd607m3fqf24rszyhbf2";
-  };
-
-  nativeBuildInputs = [ autoreconfHook ];
-
-  dontDisableStatic = true;
-
-  meta = with stdenv.lib; {
-    homepage = http://troglobit.com/editline.html;
-    description = "A readline() replacement for UNIX without termcap (ncurses)";
-    license = licenses.bsdOriginal;
-    maintainers = with maintainers; [ dtzWill ];
-    platforms = platforms.all;
-  };
-}

release-common.nix

@@ -29,8 +29,6 @@ rec {
     '';
   });
 
-  editline = pkgs.editline or (pkgs.callPackage ./editline.nix {});
-
   configureFlags =
     [
       "--enable-gc"