Move test infer_use_of_void to inference_new

pkg/front_end/testcases/inference/infer_use_of_void.dart

Index: pkg/front_end/testcases/inference/infer_use_of_void.dart
diff --git a/pkg/front_end/testcases/inference/infer_use_of_void.dart b/pkg/front_end/testcases/inference/infer_use_of_void.dart
deleted file mode 100644
index a8b29c19db08bab9892fd63d5d40eba3868d9fb8..0000000000000000000000000000000000000000
--- a/pkg/front_end/testcases/inference/infer_use_of_void.dart
+++ /dev/null
@@ -1,21 +0,0 @@
-// Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-/*@testedFeatures=inference*/
-library test;
-
-class B {
-  void f() {}
-}
-
-class C extends B {
-  /*@topType=void*/ f() {}
-}
-
-var /*@topType=dynamic*/ x =
-    new C(). /*info:USE_OF_VOID_RESULT*/ /*@target=C::f*/ f();
-
-main() {
-  x;
-}