facebook/hhvm — pull request #2776 by paravoid (2014-05-27 15:42:04+00:00)
Title: Remove CMake/FindLibEvent.cmake.bak

CMake/FindLibEvent.cmake.bak is presumably a backup file from an older
version of CMake/FindLibEvent.cmake that has been commited by accident
during the initial open-source release (commit c3f1ab2).

Remove it as it's obviously redundant.