Remove helper method used by deprecated code.

lib/neography/property_container.rb

@@ -13,22 +13,5 @@ def initialize(hash=nil)
       end
     end
 
-    # the arguments are either a Rest instance, or something else
-    def self.split_args(*args)
-      db = other = nil
-
-      args.each do |arg|
-        case arg
-        when Rest
-          db = arg
-        else
-          other = arg
-        end
-      end
-      db ||= Neography::Rest.new
-
-      [ db, other ]
-    end
-
   end
 end