Revert "Fix misoptimization of 'is' test"

tests/standalone/regress_29695_test.dart

Index: tests/standalone/regress_29695_test.dart
diff --git a/tests/standalone/regress_29695_test.dart b/tests/standalone/regress_29695_test.dart
deleted file mode 100644
index 73641a50d841a23630c95b308349811da25bcf03..0000000000000000000000000000000000000000
--- a/tests/standalone/regress_29695_test.dart
+++ /dev/null
@@ -1,28 +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.
-//
-// Test that type tests are not misoptimized.
-// VMOptions=--optimization-counter-threshold=1000 --optimization-filter=IsAnInt
-
-main() {
-  train();
-  if (IsAnInt("This is not an int")) throw "oops";
-}
-
-// Prime the IC with things that are and are not ints.
-void train() {
-  int sum = 0;
-  for (int i = 0; i < 10000; i++) {
-    IsAnInt(42); // Smi - always goes first in the generated code.
-    IsAnInt(1 << 62); // Mint on 64 bit platforms.
-    IsAnInt(1 << 62);
-    IsAnInt(4200000000000000000000000000000000000); // BigInt
-    IsAnInt(4200000000000000000000000000000000000);
-    // This one that is not an int goes last in the IC because it is called
-    // less frequently.
-    IsAnInt(4.2);
-  }
-}
-
-int IsAnInt(Foo f) => f is int;