remove some more add_xx functions

also load labels by dsl now

lib/risc/builder.rb

@@ -139,9 +139,8 @@ module Risc
 
     # for computationally building code (ie writing assembler) these short cuts
     # help to instantiate risc instructions and add them immediately
-    [:label, :reg_to_slot , :slot_to_reg , :load_constant, :load_data,
-      :function_return , :function_call, :op ,
-      :transfer , :reg_to_slot , :byte_to_reg , :reg_to_byte].each do |method|
+    [ :slot_to_reg , :load_constant, :load_data,
+       :transfer  ].each do |method|
       define_method("add_#{method}".to_sym) do |*args|
         if not @source_used
           args[0] = @source