Hi @bramvds,
I assume that you want to remove those metakeys from your database?
Please kindly run this SQL command on your database:
DELETE
FROM wp_postmeta
WHERE wp_postmeta.meta_key LIKE '%_wholesale_price'
OR wp_postmeta.meta_key LIKE '%_have_wholesale_price'
OR wp_postmeta.meta_key LIKE '%_wholesale_minimum_order_quantity'
OR wp_postmeta.meta_key LIKE '%_wholesale_order_quantity_step'
OR wp_postmeta.meta_key = 'wwpp_product_wholesale_visibility_filter'
OR wp_postmeta.meta_key = 'wwpp_post_meta_quantity_discount_rule_mapping'
Please kindly backup your database before running that command.