Deletes a reward.
You can only call this method when authenticated as a Wix app or Wix user identity.
ID of the reward to delete.
Revision number, which increments by 1 each time the reward is updated.
To prevent conflicting changes, the current revision must be passed when deleting the reward.
This method doesn’t return any custom errors, but may return standard errors. Learn more about standard Wix errors.