src/dropbox.js
function unHookSyncCycle(rs) {
  if (!rs._dropboxOrigSyncCycle) { return; } // not hooked
  rs.syncCycle = rs._dropboxOrigSyncCycle;
  delete rs._dropboxOrigSyncCycle;
}
function unHookSyncCycle(rs) {
  if (!rs._dropboxOrigSyncCycle) { return; } // not hooked
  rs.syncCycle = rs._dropboxOrigSyncCycle;
  delete rs._dropboxOrigSyncCycle;
}
Restore RemoteStorage's syncCycle original implementation
@param {object} rs RemoteStorage instance