Remove MacroDef's fields imported_from and allow_internal_unstable,

remove `export` argument of `resolver.add_macro()`.

src/librustc/hir/intravisit.rs

@@ -365,7 +365,6 @@ pub fn walk_crate<'v, V: Visitor<'v>>(visitor: &mut V, krate: &'v Crate) {
 pub fn walk_macro_def<'v, V: Visitor<'v>>(visitor: &mut V, macro_def: &'v MacroDef) {
     visitor.visit_id(macro_def.id);
     visitor.visit_name(macro_def.span, macro_def.name);
-    walk_opt_name(visitor, macro_def.span, macro_def.imported_from);
     walk_list!(visitor, visit_attribute, &macro_def.attrs);
 }
 

src/librustc/hir/lowering.rs

@@ -987,8 +987,6 @@ impl<'a> LoweringContext<'a> {
             attrs: self.lower_attrs(&m.attrs),
             id: m.id,
             span: m.span,
-            imported_from: m.imported_from.map(|x| x.name),
-            allow_internal_unstable: m.allow_internal_unstable,
             body: m.body.clone().into(),
         }
     }

src/librustc/hir/mod.rs

@@ -475,8 +475,6 @@ pub struct MacroDef {
     pub attrs: HirVec<Attribute>,
     pub id: NodeId,
     pub span: Span,
-    pub imported_from: Option<Name>,
-    pub allow_internal_unstable: bool,
     pub body: HirVec<TokenTree>,
 }
 

src/librustc/middle/stability.rs

@@ -302,9 +302,7 @@ impl<'a, 'tcx> Visitor<'tcx> for Annotator<'a, 'tcx> {
     }
 
     fn visit_macro_def(&mut self, md: &'tcx hir::MacroDef) {
-        if md.imported_from.is_none() {
-            self.annotate(md.id, &md.attrs, md.span, AnnotationKind::Required, |_| {});
-        }
+        self.annotate(md.id, &md.attrs, md.span, AnnotationKind::Required, |_| {});
     }
 }
 
@@ -373,9 +371,7 @@ impl<'a, 'tcx> Visitor<'tcx> for MissingStabilityAnnotations<'a, 'tcx> {
     }
 
     fn visit_macro_def(&mut self, md: &'tcx hir::MacroDef) {
-        if md.imported_from.is_none() {
-            self.check_missing_stability(md.id, md.span);
-        }
+        self.check_missing_stability(md.id, md.span);
     }
 }