Fix method signature --- turns out the EAS code actually needs to clear out a single folder.
Fix method signature --- turns out the EAS code actually needs to clear
out a single folder.

closeio/nylas,closeio/nylas,closeio/nylas,jobscore/sync-engine,nylas/sync-engine,nylas/sync-engine,jobscore/sync-engine,jobscore/sync-engine,nylas/sync-engine,closeio/nylas,nylas/sync-engine,jobscore/sync-engine