Remove associated opaque types

They're unused now.

Author: matthewjasper

clippy_lints/src/lifetimes.rs

@@ -379,7 +379,7 @@ impl<'a, 'tcx> Visitor<'tcx> for RefVisitor<'a, 'tcx> {
             TyKind::Path(ref path) => {
                 self.collect_anonymous_lifetimes(path, ty);
             },
-            TyKind::Def(item, _) => {
+            TyKind::OpaqueDef(item, _) => {
                 let map = self.cx.tcx.hir();
                 if let ItemKind::OpaqueTy(ref exist_ty) = map.expect_item(item.id).kind {
                     for bound in exist_ty.bounds {

clippy_lints/src/manual_async_fn.rs

@@ -99,7 +99,7 @@ impl<'a, 'tcx> LateLintPass<'a, 'tcx> for ManualAsyncFn {
 
 fn future_trait_ref<'tcx>(cx: &LateContext<'_, 'tcx>, ty: &'tcx Ty<'tcx>) -> Option<&'tcx TraitRef<'tcx>> {
     if_chain! {
-        if let TyKind::Def(item_id, _) = ty.kind;
+        if let TyKind::OpaqueDef(item_id, _) = ty.kind;
         let item = cx.tcx.hir().item(item_id.id);
         if let ItemKind::OpaqueTy(opaque) = &item.kind;
         if opaque.bounds.len() == 1;

clippy_lints/src/utils/hir_utils.rs

@@ -710,7 +710,7 @@ impl<'a, 'tcx> SpanlessHash<'a, 'tcx> {
                     segment.ident.name.hash(&mut self.s);
                 },
             },
-            TyKind::Def(_, arg_list) => {
+            TyKind::OpaqueDef(_, arg_list) => {
                 for arg in *arg_list {
                     match arg {
                         GenericArg::Lifetime(ref l) => self.hash_lifetime(l),