We have a mature product that we reuse for new projects. For one project, some tasks were created for already working features. Those tasks were all assigned 1 SP each. So, just as a sanity check, I went ahead and tested a release version of our product in order to close the said tasks.
Now, since I didn't do any work for those features to work properly, in order to reflect correctly what was done for those tasks should I close them unassigned in the backlog directly or put them in the sprint, assign them to me and close them? Am I wrong to assume that the first one would adjust the backlog SPs reallistically and the second option would give a scope change and a false representation of the burndown rate?