remove VarianceTest

Signed-off-by: Miguel Guarniz <mi9uel9@gmail.com>

Author: kckeiks

compiler/rustc_typeck/src/variance/terms.rs

@@ -185,4 +185,3 @@ impl<'a, 'tcx> TermsContext<'a, 'tcx> {
         }
     }
 }
-

compiler/rustc_typeck/src/variance/test.rs

@@ -1,28 +1,15 @@
 use rustc_errors::struct_span_err;
-use rustc_hir as hir;
-use rustc_hir::itemlikevisit::ItemLikeVisitor;
 use rustc_middle::ty::TyCtxt;
 use rustc_span::symbol::sym;
 
 pub fn test_variance(tcx: TyCtxt<'_>) {
-    tcx.hir().visit_all_item_likes(&mut VarianceTest { tcx });
-}
-
-struct VarianceTest<'tcx> {
-    tcx: TyCtxt<'tcx>,
-}
-
-impl<'tcx> ItemLikeVisitor<'tcx> for VarianceTest<'tcx> {
-    fn visit_item(&mut self, item: &'tcx hir::Item<'tcx>) {
-        // For unit testing: check for a special "rustc_variance"
-        // attribute and report an error with various results if found.
-        if self.tcx.has_attr(item.def_id.to_def_id(), sym::rustc_variance) {
-            let variances_of = self.tcx.variances_of(item.def_id);
-            struct_span_err!(self.tcx.sess, item.span, E0208, "{:?}", variances_of).emit();
+    // For unit testing: check for a special "rustc_variance"
+    // attribute and report an error with various results if found.
+    for id in tcx.hir().items() {
+        if tcx.has_attr(id.def_id.to_def_id(), sym::rustc_variance) {
+            let variances_of = tcx.variances_of(id.def_id);
+            struct_span_err!(tcx.sess, tcx.hir().span(id.hir_id()), E0208, "{:?}", variances_of)
+                .emit();
         }
     }
-
-    fn visit_trait_item(&mut self, _: &'tcx hir::TraitItem<'tcx>) {}
-    fn visit_impl_item(&mut self, _: &'tcx hir::ImplItem<'tcx>) {}
-    fn visit_foreign_item(&mut self, _: &'tcx hir::ForeignItem<'tcx>) {}
 }