Right now on iOS there are up to 3 tabs in library: movies, tv shows, and other. I personally do not have any other and I’m guessing many others do not either. I would like to see that space used for something else like playlists.
If you delete all the sub-sections from the Other section (by clicking on the icon at the top right) then it is no longer displayed.
As I said I don’t see Other. But we could use that space for something else.