I assume nothing happens if you long-press the search bar? If you are actually able to move the search bar around by long-pressing it, then also see if there's a Remove option at the top of the screen.
The other place to look would be the homescreen settings. Long-press any empty part of the homescreen, then look for a Settings or Options button. This should take you to a homescreen settings menu. See if there's an option there to include or get rid of the search bar.