A vice-chairman of the Hong Kong Bar Association has resigned out of frustration over the Bar’s position during the city’s protest crisis, a legal source said.Philip Dykes, chairman of the Bar Association, on Saturday confirmed that Edwin Choy Wai-bond had tendered his resignation as one of the association’s vice-chairmen on Wednesday, but did not give a reason.A legal source revealed to the Post that Choy, 48, had lost patience with the association’s stance on recent anti-government protests…