I don't know how I missed them before, but these appear to be out of date copies of the default search pugin. They're missing a bunch of updates from the last year, so I'm going to remove them unless there's a good reason to fix them to current standards.
Created attachment 8478795 [details] [diff] [review] yandexBing Can you enlighten me on what these are supposed to be doing?
It doesn't seem there is any explicit purpose for them. At least nobody of the team could recall one. Please remove them.