Bug 1223384 - Stop running clear_cache on stage/prod deploy
Bug 1223384 - Stop running clear_cache on stage/prod deploy

Since it should be unnecessary, and causes additional load until the
cache is re-populated, since:
* the builds-{4hr,running,pending} tasks have to ingest all jobs,
  including those previously seen
* the pushlog task defaults back to "the last 10 pushes", which in the
  case of inactive repos, means extra busy work, and for active repos
  means we might actually miss commits (particularly if the prod push
  was to fix an issue that has say broken ingestion for the last X mins)

parkouss/treeherder,KWierso/treeherder,gbrmachado/treeherder,avih/treeherder,tojonmz/treeherder,kapy2010/treeherder,tojonmz/treeherder,tojon/treeherder,avih/treeherder,akhileshpillai/treeherder,avih/treeherder,avih/treeherder,gbrmachado/treeherder,avih/treeherder,kapy2010/treeherder,sylvestre/treeherder,parkouss/treeherder,gbrmachado/treeherder,akhileshpillai/treeherder,tojonmz/treeherder,glenn124f/treeherder,glenn124f/treeherder,parkouss/treeherder,wlach/treeherder,gbrmachado/treeherder,gbrmachado/treeherder,parkouss/treeherder,wlach/treeherder,avih/treeherder,glenn124f/treeherder,tojonmz/treeherder,gbrmachado/treeherder,tojon/treeherder,tojonmz/treeherder,kapy2010/treeherder,edmorley/treeherder,parkouss/treeherder,edmorley/treeherder,sylvestre/treeherder,edmorley/treeherder,wlach/treeherder,parkouss/treeherder,sylvestre/treeherder,wlach/treeherder,tojon/treeherder,wlach/treeherder,akhileshpillai/treeherder,kapy2010/treeherder,tojon/treeherder,KWierso/treeherder,KWierso/treeherder,glenn124f/treeherder,edmorley/treeherder,sylvestre/treeherder,kapy2010/treeherder,wlach/treeherder,glenn124f/treeherder,akhileshpillai/treeherder,akhileshpillai/treeherder,KWierso/treeherder,sylvestre/treeherder,akhileshpillai/treeherder,tojonmz/treeherder,sylvestre/treeherder,glenn124f/treeherder