Questions, answers and comments you make on Ask cannot be self deleted. The only items which are deleted are when moderators determine they are against guidelines. This is a good reminder to always be careful about what you say online, because what you say on the internet, stays on the internet.
Moderators...let me repeat an answer I just gave the afternoon to this same question. People are obviously not seeing the answers you have posted. Rethink their posting because it's obviously slipping past the vast majority of people if the question keeps being asked.
Sorry, but you cannot remove any content from the site, and that would include deleting any questions that you may have asked the community. Of course you can view the questions you've asked, but once you've submitted a question, that's it.