Use this code instead by adding ?giftcard=false to the src line. See below:
<iframe id="sutraWidgetIframe" src="https://app.arketa.co/iframe/YOUR_URL_HERE/pricing/cards?giftcard=false" width="100%" frameBorder="0" allowfullscreen></iframe> <script src="https://app.arketa.co/scripts/embed.js"> </script>
NOTE: replace YOUR_URL_HERE with your scheduling URL, which is found in your dashboard > Settings > Public Facing Settings