move more of the toplevel from rust into prolog

src/prolog/macros.rs

@@ -262,12 +262,6 @@ macro_rules! put_constant {
     };
 }
 
-macro_rules! top_level_code_ptr {
-    ($p:expr, $q_sz:expr) => {
-        CodePtr::Local(LocalCodePtr::TopLevel($p, $q_sz))
-    };
-}
-
 macro_rules! get_level_and_unify {
     ($r: expr) => {
         Line::Cut(CutInstruction::GetLevelAndUnify($r))