remove obsolete UninferredClosure type

pkg/analyzer/test/src/task/strong/checker_test.dart

Index: pkg/analyzer/test/src/task/strong/checker_test.dart
diff --git a/pkg/analyzer/test/src/task/strong/checker_test.dart b/pkg/analyzer/test/src/task/strong/checker_test.dart
index d8fb80c7ac9a4fadd0aab612139a1d907e50e774..bb8216a0b18875a5b6bdae1554c5fcedce68c106 100644
--- a/pkg/analyzer/test/src/task/strong/checker_test.dart
+++ b/pkg/analyzer/test/src/task/strong/checker_test.dart
@@ -964,6 +964,16 @@ void main() {
    '''
   });
 
+  testChecker('Function subtyping: uninferred closure', {
+    '/main.dart': '''
+      typedef num Num2Num(num x);
+      void main() {
+        Num2Num g = /*info:INFERRED_TYPE_CLOSURE,severe:STATIC_TYPE_ERROR*/(int x) { return x; };
+        print(g(42));
+      }
+    '''
+  });
+
   testChecker('Relaxed casts', {
     '/main.dart': '''