Not really. I created the ticket to remind me for checking whether we have a proper ticket in in the tor-browser project as I did not have the time to do so at that moment. It seems we do, tor-browser#33803 (closed), great. But we need a ticket in this project, too, to remove the key we are currently using out of tor-browser-build.
So, let me change the ticket description accordingly.
Georg Koppenchanged title from Create second mar signing key for nightly builds and move the public parts to tor-browser to Move nightly signing keys to tor-browser
changed title from Create second mar signing key for nightly builds and move the public parts to tor-browser to Move nightly signing keys to tor-browser
Georg Koppenchanged title from Move nightly signing keys to tor-browser to Move nightly signing key to tor-browser
changed title from Move nightly signing keys to tor-browser to Move nightly signing key to tor-browser