Batch remove shops
If you have a massive amounts of the shop need to remove, there are some ways you can do that quickly.
WorldEdit
Install the Compat-WorldEdit
from Modrinth, then select the shops you want to remove, //set 0
and you're done.
Remove someone's all shops
To remove all shops you owned, simple execute /quickshop removeall
and all your shops will be deleted.
To remove someone all shops, execute /quickshop removeall <player>
as server administrator and that player all shops will be removed.