Removed titanium SDK 2.1, since it's deprecated long ago and no longer works with the new Android SDK

pkgs/development/mobile/titaniumenv/default.nix

@@ -1,19 +1,11 @@
-{pkgs, pkgs_i686, version ? "3.1"}:
+{pkgs, pkgs_i686}:
 
-let
-  titaniumexpr = if version == "2.1" then
-    ./titaniumsdk-2.1.nix
-  else if version == "3.1" then
-    ./titaniumsdk.nix
-  else
-    throw "Unknown Titanium SDK version: ${version}";
-in
 rec {
   androidenv = pkgs.androidenv;
 
   xcodeenv = if pkgs.stdenv.system == "x86_64-darwin" then pkgs.xcodeenv else null;
   
-  titaniumsdk = import titaniumexpr {
+  titaniumsdk = import ./titaniumsdk.nix {
     inherit (pkgs) stdenv fetchurl unzip makeWrapper python jdk;
   };