Note: if the project in question is a sandbox project, you're free to delete it yourself if it's empty or obsolete, without any intervention from the webmasters or infra team. When you do this, the Git repo for the sandbox, and *all* related content (e.g. issues) will also be deleted. The hope is that you're not going to delete a sandbox project that still has a bunch of useful issues. In that case, the intention is that you're going to move those issues to a more appropriate queue first (e.g. back into the issue queue for the parent project). See https://drupal.org/node/1077884 for more.
Cheers, -Derek (dww)
