Not sure of the reason why they removed it. I would be curious if someone has the answer. I am always careful when designing with that angle and a bolted connection. Any hardware bigger than 5/8" dia. begins to have fit-up issues due to the conflict with the washer and angle leg. Also, you won't make the minimum edge distance requirements and will have to look at rationalizing the reduction of that provision. Obviously, a welded connection will not have this issue. I have designed many projects with it rather recently so IMO, yes, you can still use it.