Remove url without browser name from tools/signing/download-unsigned-sha256sums-gpg-signatures-from-people-tpo
we try to download signatures from URLs that include a directory with
the browser name, and also the old type of URLs which does not:
We should keep it in the
maint-12.0 branch, but remove it from the
maint-12.0-mullvad branches, to avoid downloading
signatures for the wrong browser.