Restriction on specific content types for admin content page filter I need help with removing a content type from admin/content page's content type filter in D8. 

Let's say I have content type1, content type2 and content type3.

I want to have an exposed filter in admin/content page for content type1 and content type3.

Thanks in advance.
Just go to the /admin/structure/views/view/content and edit the 
Content: Content type (exposed) filter in the "Filter Criteria Tab" of your view.

Then just select  your type1 and type 2.