Revert Merge x-updates into master due to mesa bloat

See #490 discussion.

This reverts commit 1278859d31, reversing
changes made to 0c020c98f9.

Conflicts:
	pkgs/desktops/xfce/core/xfce4-session.nix (take master)
	pkgs/lib/misc.nix (auto)

pkgs/data/misc/gsettings-desktop-schemas/default.nix

@@ -0,0 +1,17 @@
+{ stdenv, fetchurl, glib, pkgconfig, intltool }:
+
+stdenv.mkDerivation {
+  name = "gsettings-desktop-schemas-3.2.0";
+
+  src = fetchurl {
+    url = mirror://gnome/sources/gsettings-desktop-schemas/3.2/gsettings-desktop-schemas-3.2.0.tar.xz;
+    sha256 = "0772axkd1nlf3j1lcg0zi5x5jh4zmr25k98dhn7pzppahljaj3hi";
+  };
+
+  buildInputs = [ glib ];
+  nativeBuildInputs = [ pkgconfig intltool ];
+
+  meta = {
+    inherit (glib.meta) maintainers platforms;
+  };
+}

pkgs/data/misc/poppler-data/default.nix

@@ -1,11 +1,11 @@
 { fetchurl, stdenv, cmake }:
 
 stdenv.mkDerivation rec {
-  name = "poppler-data-0.4.6";
+  name = "poppler-data-0.4.5";
 
   src = fetchurl {
     url = "http://poppler.freedesktop.org/${name}.tar.gz";
-    sha256 = "1yhaz74b50hjkz3ii077kmq3qg3p3kdyxm33cv6r1njvz8fr01pk";
+    sha256 = "1zbh1zd083wfwrcw7vxc2bn32h42y6iyh24syxcb3r5ggd2vr41i";
   };
 
   buildInputs = [ cmake ];
@@ -23,7 +23,6 @@ stdenv.mkDerivation rec {
     homepage = http://poppler.freedesktop.org/;
     description = "Encoding files for Poppler, a PDF rendering library";
     platforms = stdenv.lib.platforms.all;
-    license = "free"; # more free licenses combined
     maintainers = [ stdenv.lib.maintainers.urkud ];
   };
 }