NEW YORK STATE RIFLE & PISTOL ASSOCIATION, INC v CITY OF NEW YORK
Should SCOTUS still hear the case?
On one hand, the change to NY's law subsequent to the filing of this case is a transparent ploy by NY to avoid SCOTUS scrutiny of their bad laws.
On the other hand, there is no longer a controversy for the SCOTUS to settle. The petitioners have gotten relief, due to the changes to NY law post-filing.
Rep Sheldon Whitehouse writes this brief, chastising the court, and threatening them with court packing if they don't stand down.
https://www.whitehouse.senate.gov/imo/media/doc/New York Rifle & Pistol Association v. New York (Whitehouse%20amicus%20FINAL).pdf
Summary article about the above brief.
Regarding the original case
The case was brought by the New York State Rifle & Pistol Association and challenged New York City rules that barred transporting firearms to gun ranges outside the city limits. New York won the legal fight before two lower courts, including a panel of the 2nd U.S. Circuit Court of Appeals.
But after the Supreme Court agreed to review the Second Circuit decision, New York amended the challenged rules in order to give the challengers “everything they want, ” according to New York’s corporation counsel, Zachary Carter. Because New York voluntarily amended the disputed laws and regulations, the case should no longer be reviewed by the justices, New York argues.