that option is not available in the current version of Skype (afair, I last saw that function in version 5.3 for Windows). Just use this one instead.
how do i delete my profile picture? or how do i leave it blank?
the answer is posted above your post. :0
Yikes! I really want to delete all photos. Whatever new upgrade, now publishes my Skype photo on non-Skype applications. That is soooo invasive to me. My Skype is personal and only a few people are on my list. I DO NOT give permission to show my photo in whoever's email InBox that has my email address in their book.