UPDATE 5-Lance Armstrong steps down from charity, Nike drops him

* Armstrong out as Livestrong chairman, still board member * Donations to foundation rise despite scandal * Nike cites “seemingly insurmountable evidence” * Anheuser-Busch to end sponsorship deal as well * ESPN reports two others end deals as well AUSTIN, Texas, Oct 17 (Reuters) – Lance Armstrong stepped down as chairman of the Livestrong cancer support charity he founded, as Nike Inc dropped the disgraced cyclist over the doping scandal that will likely cost him his seven Tour de France titles. …