I'm not sure what you mean - I'm guessing your repeating table is from a secondary data source? And you'd like to know if you can delete a row in that data source? You'll need code (or qRules) for that, in general. If your secondary data source is a SharePoint List and you are not using Office 365, you could use CAML - have a button that submits the CAML to the lists data service, then query it again to show the table without that row.
Hilary Stoupa
