AUSTIN, Texas — A Texas judge on Thursday declared four men who were wrongfully accused of the 1991 Austin yogurt shop murders innocent, formally clearing their names in a courtroom for the first time since the killings of four teenage girls that haunted the city for decades. “You are innocent,” state District Judge Dayna Blazey said during a hearing in a packed Austin courtroom. The declaration closed a dark chapter for the men and their families, and for a city shaken by the brutality of the