The short answer is no. Visit Delete Quantity Breaks Variants for the proper steps to remove the variants.
Note: If you want to process any imports and exports, do this with the quantity breaks group disabled. Once this is complete, you can turn it back on. Any changes you have made will automatically be applied to the quantity breaks groups.
The Quantity Breaks (standalone) app is no longer available for new installations. If you are currently using Quantity Breaks, you will be able to continue using the app on a grandfathered plan.
New requests for Quantity Breaks will be directed to Custom Pricing which has a Quantity Breaks plan available. For more information, please visit Custom Pricing Overview.
If you'd like move from Quantity Breaks (standalone) to Custom Pricing, please visit Switch from Quantity Breaks to Custom Pricing.