Same way you delete any form? 

Sometimes that 1099g worksheet is weird and wont let you delete it, I feel like it happens when multiple states are involved.

Alt w 

West Virginia 1099G not needed for 2020. Unable to delete. Do not have any FEIN to enter, etc. since taxpayer did not get form for 2020 

How to fix?

Yes, filed WV tax return for 2019 and did get refund.