Tack “&udm=14” on to the end of a normal search, and you’ll be booted into the clean 10 blue links interface. While Google might not let you set this as a default, if you have a way to automatically edit the Google search URL, you can create your own defaults.
But it’s not a workaround. This Web-Filter is a function that Google offers by choice. It’s in the menu on the search page.