fontconfig_210: remove

This isn't used anymore anywhere, and vulnerable to CVE-2016-5384.

pkgs/development/libraries/fontconfig/2.10.nix

@@ -1,47 +0,0 @@
-{ stdenv, fetchurl, pkgconfig, freetype, expat
-}:
-
-stdenv.mkDerivation rec {
-  name = "fontconfig-2.10.2";
-
-  src = fetchurl {
-    url = "http://fontconfig.org/release/${name}.tar.bz2";
-    sha256 = "0llraqw86jmw4vzv7inskp3xxm2gc64my08iwq5mzncgfdbfza4f";
-  };
-
-  outputs = [ "bin" "dev" "lib" "out" ]; # $out contains all the config
-
-  propagatedBuildInputs = [ freetype ];
-  nativeBuildInputs = [ pkgconfig ];
-  buildInputs = [ expat ];
-
-  configureFlags = [
-    "--with-arch=${stdenv.hostPlatform.parsed.cpu.name}"
-    "--sysconfdir=/etc"
-    "--with-cache-dir=/var/cache/fontconfig"
-    "--disable-docs"
-    "--with-default-fonts="
-  ] ++ stdenv.lib.optionals (stdenv.hostPlatform != stdenv.buildPlatform) [
-    "--with-arch=${stdenv.hostPlatform.parsed.cpu.name}"
-  ];
-
-  enableParallelBuilding = true;
-
-  doCheck = true;
-
-  # Don't try to write to /var/cache/fontconfig at install time.
-  installFlags = [ "sysconfdir=$(out)/etc" "fc_cachedir=$(TMPDIR)/dummy" "RUN_FC_CACHE_TEST=false" ];
-
-  passthru = {
-    # Empty for backward compatibility, there was no versioning before 2.11
-    configVersion = "";
-  };
-
-  meta = with stdenv.lib; {
-    description = "A library for font customization and configuration";
-    homepage = "http://fontconfig.org/";
-    license = licenses.bsd2; # custom but very bsd-like
-    platforms = platforms.all;
-    maintainers = [ maintainers.vcunat ];
-  };
-}