Delete old metafields from uninstalled (or deleted) app

[javl]

During development of a new app I've created some metafield definitions for my products. I've now uninstalled the app, but these metafield definitions are still visible for the merchant which is useless for them and clutters the interface. How can a merchant delete old metafields that are not in use anymore?

I've been trying to manually remove the fields via my app (which doesn't work, but that's a separate issue I've been in contact about with support), but some of my metafields have been created with a test app which since then has been completely deleted and so there is no way for me to access its namespace anymore, which means I can't get the needed permission to modify anything. Is there no way for a merchant to overrule this and delete them anyway? I can't imagine every app cleans up after itself and there must be some way for users to do this themselves, right?

 

[javl]

What is the best area of the forums to post these kind of development questions? I posted in here as I'm making a 3rd party app (me being the 3rd party) but maybe there is a better location? It just seems to my like there is no actual sections for this.

[javl]

Just realized there is a 'view more' button on the homepage and there actually IS a developers section. Moving this question there, sorry for the inconvenience and posting in the wrong topic.