The title of my issue is clear enough by itself I hope.... I have only one application in my Applications list in Azure Active Directory. I would like to delete that, because it
Whilst old, I stubmled across this issue earlier and found this post.
The portal has changed and none of the above worked for me (although I did not edit the manifest) - what I did do was go into AAD > Enterprise Applications and, from there, I could delete the Native applications.
Hope this helps someone (possibly me!) later.