Removing items from the dashboard

Can an admin remove items from the dashboard? I have a few items I would like to remove but I can see no way to do this.

What are you trying to remove? You can remove log entries manually via phpmyadmiin or something similar.

Someone tested PP by uploading a file with an inappropriate title. I deleted the file but the notice of its deletion is still in the dashboard. I wanted to get rid of the notice of its deletion as well.

You have to delete log entries manually - open the database table 'pp_application_logs', and delete the rows that refer to the file