remove dead code

src/prolog/codegen.rs

@@ -22,18 +22,8 @@ pub enum EvalSession<'a> {
     SubsequentQuerySuccess,
 }
 
-impl<'a> EvalSession<'a> {
-    #[allow(dead_code)]
-    pub fn failed_query(&self) -> bool {
-        if let &EvalSession::QueryFailure = self {
-            true
-        } else {
-            false
-        }
-    }
-}
-
-impl<'a, TermMarker: Allocator<'a>> CodeGenerator<'a, TermMarker> {
+impl<'a, TermMarker: Allocator<'a>> CodeGenerator<'a, TermMarker>
+{
     pub fn new() -> Self {
         CodeGenerator { marker:  Allocator::new(),
                         var_count: HashMap::new() }
@@ -258,10 +248,9 @@ impl<'a, TermMarker: Allocator<'a>> CodeGenerator<'a, TermMarker> {
 
         match toc {
             &TermOrCut::Term(Term::Clause(_, ref name, _))
-          | &TermOrCut::Term(Term::Constant(_, Constant::Atom(ref name))) => {
+          | &TermOrCut::Term(Term::Constant(_, Constant::Atom(ref name))) =>
               if let &mut Line::Control(ref mut ctrl) = body.last_mut().unwrap() {
                   *ctrl = ControlInstruction::Execute(name.clone(), last_arity);
-                    }
               },
             _ => dealloc_index = body.len()
         };