If previous build create metadata generation job, the repository will be left in
unsigned state for up to 5-20 seconds. We cannot do anything with this as how
Bintray works. When this case happens, signature checks will fail causing build
failure.
See https://gitlab.com/termux-mirror/termux-packages/-/jobs/175356747.
For now, gpg checks are permanently disabled. When a better solution will be
found, feel free to revert this commit.