Bulk deletions in SKU IQ are not supported at this time.
Unfortunately at this time, there is not an option to perform bulk deletions or mass deletions from SKU IQ. This is due to our concerns with keeping your data safe and with data integrity. SKU IQ allows you the flexibility of using your existing platforms to perform bulk actions, including uploads, editing, and mass deletions.
Check out these support articles on how to perform bulk actions on your specific platforms:
Clover:
Bulk Upload || Bulk Edit || Bulk Delete
Shopify:
Bulk Upload || Bulk Edit || Bulk Delete