Unless Browning has changed something, the pin is simply a tight fit. On general principles, drive it out from the left, but I don't think it makes any difference.
Unless there is a good reason to remove the trigger, I don't recommend it. (I don't recommend removing the magazine safety either, which is the reason some people want to remove the trigger.)
The mag safety can be smoothed up by polishing the front of the magazine and then polishing the part that contacts the magazine. It is easy, and doesn't remove a safety.
Jim
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