small clean

lib/bosl/compiler.rb

@@ -17,8 +17,7 @@ module Bosl
     #
     # Everything in ruby is an expression, ie returns a value. So the effect of every compile
     # is that a value is put into the ReturnSlot of the current Message.
-    # The compile method (so every compile method) returns the value that it deposits which
-    # may be unknown Unknown value.
+    # The compile method (so every compile method) returns the value that it deposits.
     #
     # The process uses a visitor pattern (from AST::Processor) to dispatch according to the
     # type the expression. So a s(:if xx) will become an on_if(node) call.

lib/bosl/compiler/basic_expressions.rb

@@ -72,9 +72,5 @@ module Bosl
         r
       end
 
-      def on_variable expression
-        method.source.add_code InstanceGet.new(expression.name)
-        Virtual::Return.new( Unknown )
-      end
   end
 end