Revert "Reland "VM: Handle null-comparisons in the flow graph type propagation""

tests/language/vm/integer_type_propagation2_test.dart

Index: tests/language/vm/integer_type_propagation2_test.dart
diff --git a/tests/language/vm/integer_type_propagation2_test.dart b/tests/language/vm/integer_type_propagation2_test.dart
deleted file mode 100644
index 05cfb348fb148db21e254ae11b77e2379a558829..0000000000000000000000000000000000000000
--- a/tests/language/vm/integer_type_propagation2_test.dart
+++ /dev/null
@@ -1,36 +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 various optimizations and deoptimizations of optimizing compiler..
-// VMOptions=--enable-inlining-annotations --no-background-compilation --optimization-counter-threshold=1000
-
-import "package:expect/expect.dart";
-import "dart:typed_data";
-
-const noInline = "NeverInline";
-const alwaysInline = "AlwaysInline";
-
-var list = new Uint32List(1);
-
-@noInline
-testuint32(bool b) {
-  var t;
-  if (b) {
-    t = list[0];
-  }
-  if (t != null) {
-    return t & 0x7fffffff;
-  }
-  return -1;
-}
-
-main() {
-  var s = 0;
-  testuint32(true);
-  testuint32(false);
-  for (int i = 0; i < 10000; ++i) {
-    testuint32(true);
-  }
-  Expect.equals(0, testuint32(true));
-  Expect.equals(-1, testuint32(false));
-}