Revert "Update Liberation fonts"

This reverts commit e85f67f. It makes
NixOS depend on Atlas, gfortran, numpy, etc. In particular nothing
importation should ever gepend on Atlas, because it's prone to random
build failures:

  http://hydra.nixos.org/build/16766850

pkgs/data/fonts/redhat-liberation-fonts/default.nix

@@ -1,20 +1,19 @@
-{stdenv, fetchurl, fontforge, python, pythonPackages}:
+{stdenv, fetchurl}:
 
 stdenv.mkDerivation rec {
-  name = "liberation-fonts-2.00.1";
+  name = "liberation-fonts-1.04";
+
   src = fetchurl {
     url = "https://fedorahosted.org/releases/l/i/liberation-fonts/${name}.tar.gz";
-    sha256 = "1ymryvd2nw4jmw4w5y1i3ll2dn48rpkqzlsgv7994lk6qc9cdjvs";
+    sha256 = "189i6pc4jqhhmsb9shi8afg9af9crpmz9bnlldhqaxavr1bhj38f";
   };
 
-  buildInputs = [fontforge python pythonPackages.fonttools];
-
   installPhase = ''
     mkdir -p $out/share/fonts/truetype
-    cp -v $( find . -name '*.ttf') $out/share/fonts/truetype
+    cp -v *.ttf $out/share/fonts/truetype
 
     mkdir -p "$out/doc/${name}"
-    cp -v AUTHORS ChangeLog COPYING License.txt README "$out/doc/${name}" || true
+    cp -v AUTHORS ChangeLog COPYING License.txt README "$out/doc/${name}"
   '';
 
   meta = {