Zalawadia v. Ashcroft, 371 F.3d 292 (5th Cir. June 4, 2004) (removal of noncitizen while appeal of district court dismissal of habeas petition was pending in court of appeal did not deprive district court of habeas jurisdiction on remand, and case was not moot, but district court lacked authority to grant any relief beyond vacating defective deportation order).