No, I cannot delete your account. It's likely no one else on this community forum can delete your account, either, but that can't be said definitively without knowing what account you're talking about. You just created your community account so it seems unlikely that's the one you're talking about.
If you want to cancel your splunk.com account then you need to contact Splunk Support.
--- If this reply helps you, an upvote would be appreciated.