RIAs know that they're not supposed to have any form of testimonials in their advertising materials. On LinkedIn, that has always meant not posting any "recommendations" to your profile. About two month ago, LinkedIn added "endorsements" to everyone's profiles, and investment adviser reps must now turn those off.
Bill Winterberg, CFP, a technology consultant who writes regularly about advisor technology, has made a very helpful two-minute video that shows you how to remove LinkedIn endorsements from your profile. It's not a Hollywood blockbuster, but it is very helpful.