Posts are not and will not be deleted just because they become outdated or you wish them to be deleted.
It is you who choose to and are posting in a "public" forum, so please post information appropriately ensuring privacy is not breached.
That said, if you wish to have your account deactivated (which doesn't mean that your posts will get deleted too), please leave a request here
. The needful (deactivation of account, not deletion of posts) will be done - at the moderators' convenience!