Fix bot, law of the excluded middle still holds

test/codegen/language/type_no_hoisting_test.dart

Index: test/codegen/language/type_no_hoisting_test.dart
diff --git a/test/codegen/language/type_no_hoisting_test.dart b/test/codegen/language/type_no_hoisting_test.dart
index fa52f4d5b36763838c0ba3c9f116db7710441b72..8dcbb2dbd5fc4fd527468e7c95d59360f00c5e0a 100644
--- a/test/codegen/language/type_no_hoisting_test.dart
+++ b/test/codegen/language/type_no_hoisting_test.dart
@@ -49,7 +49,6 @@ void main() {
   {
     C c = new C(0, 1);
     Expect.isTrue(c is C);
-    Expect.isTrue(c is! C);
     Expect.isTrue(c.f is ToVoid<int>);
     Expect.isTrue(C.g is Id<int>);
   }