Revert 15940: "Compilation type and state allocate an unnecessary Smi on v8::Script."

Due to Mozilla test failures on Win32 debug

TBR=mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/21062004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@15957 ce2b1a6d-e550-0410-aec6-3dcde31c8c00