Revert "Fix language tests wrt. warnings."

tests/language/dynamic_prefix_core_test.dart

Index: tests/language/dynamic_prefix_core_test.dart
diff --git a/tests/language/dynamic_prefix_core_test.dart b/tests/language/dynamic_prefix_core_test.dart
index 464ed2612a4b7c69b04fb1554cacc54ad9a853f2..4a5362a3aa64669d09267bde9a9104ed276ecc37 100644
--- a/tests/language/dynamic_prefix_core_test.dart
+++ b/tests/language/dynamic_prefix_core_test.dart
@@ -11,7 +11,7 @@ void main() {
   // Should still be available because it is not a member of dart:core.
   Expect.isTrue(dynamic is mycore.Type);
 
-  Expect.throws(() => mycore.dynamic is mycore.Type,     /// 01: static type warning
-                (e) => e is mycore.NoSuchMethodError,    /// 01: continued
-                'dynamic is not a member of dart:core'); /// 01: continued
+  Expect.throws(() => mycore.dynamic is mycore.Type,
+                (e) => e is mycore.NoSuchMethodError,
+                'dynamic is not a member of dart:core');
 }