Removed obsolete and dead includes.

BUG=353954
LOG=N
R=ulan@chromium.org

Review URL: https://codereview.chromium.org/203593014

Patch from Dmitry Zvorygin <zvorygin@chromium.org>.

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@20085 ce2b1a6d-e550-0410-aec6-3dcde31c8c00