Remove nokogiri override in ChefDK

config/projects/chefdk.rb

@@ -37,11 +37,13 @@
 override :berkshelf,      version: "master"
 override :bundler,        version: "1.7.2"
 override :chef,           version: "11.16.0"
+
+# TODO: Can we bump default versions in omnibus-software?
 override :libedit,        version: "20130712-3.1"
 override :libtool,        version: "2.4.2"
 override :libxml2,        version: "2.9.1"
 override :libxslt,        version: "1.1.28"
-override :nokogiri,       version: "1.6.1"
+
 override :ruby,           version: "2.1.2"
 override :'ruby-windows', version: "2.0.0-p451"
 override :rubygems,       version: "2.4.1"