Revert "Tests that the GC doesn't mistake non-pointer constant pool entries as pointers."

This reverts commit r22608 for breaking win and arm64, ConstantPoolExtended and ConstantPoolSmall.

BUG=
TBR=rmcilroy@chromium.org

Review URL: https://codereview.chromium.org/415773010

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@22609 ce2b1a6d-e550-0410-aec6-3dcde31c8c00