[test] Remove bogus --crankshaft flag from a modules test.

test/mjsunit/modules-turbo.js

Index: test/mjsunit/modules-turbo.js
diff --git a/test/mjsunit/modules-turbo.js b/test/mjsunit/modules-turbo.js
deleted file mode 100644
index 46d5319352b99850ba7f45a569b46712f4a7d9ba..0000000000000000000000000000000000000000
--- a/test/mjsunit/modules-turbo.js
+++ /dev/null
@@ -1,14 +0,0 @@
-// Copyright 2016 the V8 project authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// MODULE
-// Flags: --allow-natives-syntax --crankshaft
-
-export let x = 0;
-function foo() { x++ };
-foo();
-%OptimizeFunctionOnNextCall(foo);
-foo();
-assertOptimized(foo);
-assertEquals(2, x);