PHILADELPHIA — Doug Mastriano, the Republican nominee for governor, is sounding the “fake news” alarm over a Monday Inquirer article about his disappearing Facebook videos, claiming that they were removed due to a “default Facebook setting” that automatically deleted the videos after 30 days. His campaign did not address why the most recent video cited in the story — recorded in late June — had already disappeared within about a week, or why many videos that are older than 30 days have not been deleted. Jenna Ellis, a Mastriano legal adviser and former attorney for Donald Trump who was involve…