The vendors can use the Magento 2 Manage Attribute Set feature to delete the attribute set.

To delete the attribute set

1. Go to the Vendor Panel.
2. On the left navigation bar, click the Product Attributes menu.
   The menu appears as shown in the following figure:
   
3. Click Manage Attribute Set.
   The Attribute Sets page appears as shown in the following figure:
   
   All the created attribute sets are listed on the Attribute Set page.
4. Scroll down to the required attribute set to delete.
5. Click the respective row.
   The Edit Attribute Set page appears as shown in the following figure:
   
6. On the top navigation bar click the Delete button.
   The attribute set is deleted and the success message appears on the Attribute Sets page.