haskell-packages.nix: delete obsolete 'gtk2hsC2hs' alias

Changed files
-1
pkgs
-1
pkgs/top-level/haskell-packages.nix
···
gtkglext = callPackage ../development/libraries/haskell/gtkglext { gtkglext = pkgs.gnome2.gtkglext; };
gtk2hsBuildtools = callPackage ../development/libraries/haskell/gtk2hs-buildtools {};
-
gtk2hsC2hs = self.gtk2hsBuildtools;
gtksourceview2 = callPackage ../development/libraries/haskell/gtksourceview2 {
inherit (pkgs.gnome) gtksourceview;