Remove unnamed field feature

tests/ui/unpretty/expanded-exhaustive.stdout

@@ -361,8 +361,6 @@ mod expressions {
 
 
 
-
-
 
 
 
@@ -636,22 +634,6 @@ mod types {
     fn ty_never() { let _: !; }
     /// TyKind::Tup
     fn ty_tup() { let _: (); let _: (T,); let _: (T, T); }
-    /// TyKind::AnonStruct
-    fn ty_anon_struct() {
-        struct Struct {
-            _: struct  {
-                t: T,
-            },
-        }
-    }
-    /// TyKind::AnonUnion
-    fn ty_anon_union() {
-        struct Struct {
-            _: union  {
-                t: T,
-            },
-        }
-    }
     /// TyKind::Path
     fn ty_path() {
         let _: T;