In Gunn v. Credit Suisse Group AG., No. 13-4738, 2015 WL 1787011, — F. App’x — (3d Cir. Apr. 21, 2015) (unpublished), the Third Circuit joined the District of Columbia, Second, Fourth, Seventh, Eighth, and Ninth Circuits, in holding that a pro se relator cannot maintain a qui tam action after the government has declined