[runtime] Remove useless IN builtin.

test/cctest/compiler/test-run-inlining.cc

Index: test/cctest/compiler/test-run-inlining.cc
diff --git a/test/cctest/compiler/test-run-inlining.cc b/test/cctest/compiler/test-run-inlining.cc
index 1b2559fc5f492fd077fcb00ef49ed9b717da17a4..5119bb73ee832cd1f0730869b8bfacba5343d2a9 100644
--- a/test/cctest/compiler/test-run-inlining.cc
+++ b/test/cctest/compiler/test-run-inlining.cc
@@ -415,20 +415,6 @@ TEST(InlineIntrinsicIsSmi) {
 }
 
 
-TEST(InlineIntrinsicIsNonNegativeSmi) {
-  FunctionTester T(
-      "(function () {"
-      "  var x = 42;"
-      "  function bar(s,t) { return %_IsNonNegativeSmi(x); };"
-      "  return bar;"
-      "})();",
-      kInlineFlags);
-
-  InstallAssertInlineCountHelper(CcTest::isolate());
-  T.CheckCall(T.true_value(), T.Val(12), T.Val(4));
-}
-
-
 TEST(InlineIntrinsicIsArray) {
   FunctionTester T(
       "(function () {"