Revert "Use constant types to represent the fixed right arg of a MOD."

This reverts commit r18228 for crashing on Windows.

TBR=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/101663002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18229 ce2b1a6d-e550-0410-aec6-3dcde31c8c00