ImmaBe just made a code upgrade so that users can delete any contribution or any problem they post.
That action is possible by simply clicking on the trash button as illustrated below.
However, the removal of a problem’s contribution is possible only if you are the user who posted the problem or the one who posted the contribution and deleting a problem is possible only if you are its author. ImmaBe would like to add that the author of a problem can also remove guest contributions.
We understand and encourage the need of collaboration in problem solving; therefore the deletion process has been implemented in such a way that the user whose problem’s contribution has been deleted will still be notified whenever a new commit is added to the resolution of the problem.
The removal capability is available to all users.