By Alek Arend The Rev. Al Sharpton is calling on the NBA to remove Phoenix Suns principal owner Robert Sarver. An ESPN investigation last year found Sarver allegedly has a pattern of racism and misogyny. The NBA has since opened its own investigation. However, the investigation is ongoing an there’s no clear timetable. Although the NBA needs time to complete its investigation, Sarver is calling on the Association to either come to a decision or release a timeline for resolution. “The owner of the Suns was revealed in the ESPN story last November — how Sarver, the principal owner of the Phoenix…