The Great Google has embarked upon the removal of all ppc or paid ads to the right of search results.
This decision has been in the works, rather testing and tweaking here and there, for the last 6 years.
The only exception to the once littered PPC ads space is seeing either Product Listing Ad boxes or Knowledge Panel ads.
And just like that, Google has now seamlessly provided a similar, if not identical, search experience for desktop and mobile while increasing their revenue.
What a rabbit they pulled out of the SEO hat on this trick.