To delete a Variation Child from a Variation Parent:

• Inventory > Variations > find the Variation Parent it belongs under > Edit > find the Child SKU > Delete.

To delete a Variation Parent:

• Inventory > Variations > select the Variation Parent > Delete.

To delete Variation Parents in bulk:

• Create a CSV with the Parent SKUs > Run Delete Variation Items import

Full details on working with Variation items and the Variations screen are available here.