This newly discovered search app/slot could be associated with an app as used or supported by your provider, often this may mean it can't be removed. However, depending on your searches, this search app could be an add-on which was installed via another app you've acquired. In other words, one should avoid hidden apps or clause within apps that may require one to install a hidden apps which you may or may not be aware of. Thus one would need to uninstall the previous app or clean slate the system in order to get rid of the anonymous app.