function objectDelete(authInfo, request, log, cb) {
    log.debug('processing request', { method: 'objectDelete' });
    return objectDeleteInternal(authInfo, request, log, false, cb);
}
This function is used to delete an object from a bucket. The bucket must
already exist and the user must have permission to delete the object.
@param {AuthInfo} authInfo - Instance of AuthInfo class with requester's info
@param {object} request - http request object
@param {werelogs.Logger} log - Logger object
@param {function} cb - callback to server
@return {undefined}