diff --git a/lib/vagrant.rb b/lib/vagrant.rb
index 6647c854e..51b492cf3 100644
--- a/lib/vagrant.rb
+++ b/lib/vagrant.rb
@@ -24,29 +24,11 @@ module Vagrant
     attr_reader :flags
 
     def initialize(*_)
-      @flags = []
       super
       Vagrant.default_cli_options.each do |opt_proc|
         opt_proc.call(self)
       end
     end
-
-    def on(*opts, &block)
-      super
-      # TODO: make this not a disaster
-      if opts[0][0,2] == "--"
-        ln = opts[0].split(" ")[0][2..-1]
-      else
-        ln = opts[1].split(" ")[0][2..-1]
-      end
-      @flags.append(
-        {
-          long_name: ln,
-          description: opts[-1],
-          type: String
-        }
-      )
-    end
   end
 end