Revert "Add debug output to presubmit script for investigating tree check behavior." and "Add more temporary debugging output to PRESUBMIT.py".

This reverts commits r18538 and r18528, since the investigated problem was found.

BUG=
TBR=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/133993002

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@18544 ce2b1a6d-e550-0410-aec6-3dcde31c8c00