remove unused methods

and a whole lot more index fixes

test/vool/to_mom/send/test_send_args_send.rb

@@ -27,7 +27,7 @@ module Vool
       left = @ins.next(1).arguments[0].left
       assert_equal Symbol, left.known_object.class
       assert_equal :message, left.known_object
-      assert_equal [:next_message, :arguments, 2], left.slots
+      assert_equal [:next_message, :arguments, 1], left.slots
     end
   end
 end

test/vool/to_mom/send/test_send_simple_string.rb

@@ -18,7 +18,7 @@ module Vool
     def test_args_one_str
       assert_equal Mom::IntegerConstant,    @ins.next.arguments[0].right.known_object.class
       assert_equal 1,    @ins.next.arguments[0].right.known_object.value
-      assert_equal [:next_message, :arguments, 2],    @ins.next.arguments[0].left.slots
+      assert_equal [:next_message, :arguments, 1],    @ins.next.arguments[0].left.slots
     end
   end
 end