Remove strong mode support from materialized literals.

test/message/strong-object-set-proto.out

Index: test/message/strong-object-set-proto.out
diff --git a/test/message/strong-object-set-proto.out b/test/message/strong-object-set-proto.out
deleted file mode 100644
index bf2c9334f701bc0bdf503adcf341093312a807d0..0000000000000000000000000000000000000000
--- a/test/message/strong-object-set-proto.out
+++ /dev/null
@@ -1,9 +0,0 @@
-# Copyright 2015 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.
-*%(basename)s:9: TypeError: On strong object #<Object>, redefining the internal prototype is deprecated
-({}).__proto__ = {};
-               ^
-TypeError: On strong object #<Object>, redefining the internal prototype is deprecated
-    at Object.set __proto__ (native)
-    at *%(basename)s:9:16