Currently is WordPress version 3.6 in Beta status. But new nice features are available and ready to test. One of this features is the new UI for the post formats. Post formats is a nice chance for more possibilities to declare a post to your readers. But sometimes we don’t need post formats. The default for hide the Post Format UI is user specific and is an option in the screen options, see the screenshot.
The feature of Post Format UI is active on default, but there is the filter hook
enable_post_format_ui to deactivate for all users in the system.
You can create a small Plugin, activate and the edit screen is without the UI of Post Format.
The overwhelming consensus is that Post Formats UI is not ready for WordPress core, and that it would be a mistake to ship it as it currently exists. We’re going to pull it out, and let it continue development as a plugin. I think that is a good decision.