transcription.go
func (c *TranscriptionService) Delete(ctx context.Context, sid string) error {
	return c.client.DeleteResource(ctx, transcriptionPathPart, sid)
}
func (c *TranscriptionService) Delete(ctx context.Context, sid string) error {
	return c.client.DeleteResource(ctx, transcriptionPathPart, sid)
}
// Delete the Transcription with the given sid. If the Transcription has
// already been deleted, or does not exist, Delete returns nil. If another
// error or a timeout occurs, the error is returned.