Am I correct in understanding that you want to do is to drop the Collection (if I may use an SQLism), and you're being told how to delete rows within the collection?
I'd also be very happy to know how to drop a Collection as well.
To remove a collection from Power Apps you must clear the collection, this can be done via exiting or using Clear(CollectionName), you must then remove any references to it.Once all the references to a collection have been removed the collection will disappear from your app.I had collection stuck in an app once that was collecting images, I found that I had accidently placed a collect on the OnVisible property for a screen I had duplicated a few times, very annoying.
I left the suggestion below on the Ideas area of this site.
Please let me know your views; and if you approve of the general idea, feel free to vote it up.
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