Do not use ranges after range analysis.

Due to the SSA vs. SSI difference, we are only allowed to use the
flags computed during range analysis, not the ranges themselves. For
the case at hand, there is no such flag, so the condition is simply
remvoed.

BUG=361608
LOG=y
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/232553004

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20645 ce2b1a6d-e550-0410-aec6-3dcde31c8c00