When I try to implement the delete comment feature in the Steemia app, I noticed that there is no method in the SteemConnect SDK to delete comments.
The interesting thing is that when you login to an application with SteemConnect, the application wants authorization to delete the comment.
EDIT
We can generate the delete comment link like transfers.
https://steemconnect.com/sign/delete-comment?author=AUTHOR&permlink=PERMALINK