remove todo

src/l2/codegen.rs

@@ -412,7 +412,6 @@ impl<'a> CodeGenerator<'a> {
         vfs
     }
 
-    //TODO: remove this if it proves to be unnecessary.
     fn add_conditional_call(compiled_query: &mut Code, term: &Term) {
         match term {
             &Term::Atom(_, ref atom) => {