Contour was broken for aarch64 in #253334, and completely broke
in #344788 for all platforms.
This removes the broken package, and adds a notice to remove broken
packages in the future. aarch64 users have waited a year for this to be
fixed, so I think we should lean to be more eager to remove in general,
and then the fix can come when it is ready, instead of letting it block
this.
Resolves: #258515
Signed-off-by: Christina Sørensen <christina@cafkafk.com>
c911876981