Remove support for dyn*

compiler/rustc_parse/src/parser/ty.rs

@@ -796,16 +796,10 @@ impl<'a> Parser<'a> {
     ///
     /// Note that this does *not* parse bare trait objects.
     fn parse_dyn_ty(&mut self, impl_dyn_multi: &mut bool) -> PResult<'a, TyKind> {
-        let lo = self.token.span;
         self.bump(); // `dyn`
 
-        // parse dyn* types
-        let syntax = if self.eat(exp!(Star)) {
-            self.psess.gated_spans.gate(sym::dyn_star, lo.to(self.prev_token.span));
-            TraitObjectSyntax::DynStar
-        } else {
-            TraitObjectSyntax::Dyn
-        };
+        // We used to parse `*` for `dyn*` here.
+        let syntax = TraitObjectSyntax::Dyn;
 
         // Always parse bounds greedily for better error recovery.
         let bounds = self.parse_generic_bounds()?;