I have the same question and I don't believe chris_g's response really addresses the question fully. The answer only addresses the channels and topics the user would already have in their favorites. The answer provided does not answer how the user can remove Politics, Top Stories, Featured Stories, and Trending Stories from For You.
I find these sections provide me with articles and topics I'm not interested in. They also take up too much space leaving the More For You sections --the articles selected based on the user's favorites, small and few in-between.
Although I welcome the cosmetic changes to the News app I do not like the unsolicited content being pushed.
Again, I would like to remove politics, top stories, featured stories, trending stories from the for you page on news app? please have this it was better before we can remove it
Thanks