It is still there ... just cleverly hidden for some awful reason.
Instead of simply checking a box and type in your key word like it used to be ... now you have to:
1: Search by keyword
2: Click on 'Images' at the top centre of the screen. I know, it's not even apparent that it is a link.
3: Then click on the small Audio Slider icon back by the search tool
4: Then a window will open up where you can set your search details.
5: Note: It is impossible to search for say .jpgs and videos in the same search now.
6: then if you want to sort by relevance you have to go to a totally different place in the top right corner of the screen