change or deactivate iOS 9 newsfeed on the search screen
You can disable it by navigating to Settings > General > Spotlight Search
This will however disable the whole news feed and other Spotlight Search feed items such as:


recent applications
recent contacts
nearby places


When you scroll down the Spotlight Search settings, please check out the "About Spotlight Suggestions &amp; Privacy..." link on the bottom.
This will contain a lot of information about what information is sent from your phone to Apple and third parties like Microsoft when you open or use Spotlight Search.
This information includes among other things: search queries, location, account names, subscription information.

More information about Spotlight Search can be found here.