You can no longer set env vars on Builders via `use`

lib/vagrant/action/builder.rb

@@ -32,11 +32,6 @@ module Vagrant
       #
       # @param [Class] middleware The middleware class
       def use(middleware, *args, &block)
-        # Prepend with a environment setter if args are given
-        if !args.empty? && args.first.is_a?(Hash) && middleware != Env::Set
-          self.use(Env::Set, args.shift, &block)
-        end
-
         if middleware.kind_of?(Builder)
           # Merge in the other builder's stack into our own
           self.stack.concat(middleware.stack)

test/unit/vagrant/action/builder_test.rb

@@ -50,18 +50,6 @@ describe Vagrant::Action::Builder do
       two.call(data)
       data[:one].should == true
     end
-
-    it "should be able to set additional variables when using" do
-      data  = { }
-      proc1 = Proc.new { |env| env[:data] += 1 }
-
-      # Build the first builder
-      one   = described_class.new
-      one.use proc1, :data => 5
-      one.call(data)
-
-      data[:data].should == 6
-    end
   end
 
   context "inserting" do