It has [been asked already][1] on the main Meta site ([several][2] [times][3])... and declined by the Dev team. So I don't think it will change now. 

You can find a [GreaseMonkey][4] script on the main question, if you want to remove them for yourself.


  [1]: http://meta.stackexchange.com/questions/12599/remove-vote-ui-elements-beside-own-question-and-answer-posts
  [2]: http://meta.stackexchange.com/questions/15616/why-are-the-buttons-for-voting-on-your-own-question-or-answer-visible?lq=1
  [3]: http://meta.stackexchange.com/questions/52729/instead-of-you-cant-upvote-for-yourself-message-wouldnt-it-be-better-to-simp?lq=1
  [4]: http://meta.stackexchange.com/a/12708/132632