Remove unused main in elasticRecheck.py

main in elasticRecheck was originally used for testing before the bot
was ready, but now that we have the bot working and it supports noirc
and no gerrit comment modes (tox -erun) there is no need to include a
main() here.

Change-Id: I6e1d790b78d2f2eafacd8efcaf132cf4479fe8ca
Merge "Remove unused main in elasticRecheck.py"