Move from kombu.five.monotonic to time.monotonic
Looks like kombu finally axed python2 support.
Test Plan
tox -r -e py37
Migrated from D4036 (view on Phabricator)
Staging instance, all changes can be removed at any time
Looks like kombu finally axed python2 support.
tox -r -e py37
Migrated from D4036 (view on Phabricator)