tests/functional: remove obsolete reference to avocado bug

Historical bugs in avocado related to zstd support are not relevant to
the code now that it uses QEMU's native test harness.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20241121154218.1423005-7-berrange@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20241121165806.476008-7-alex.bennee@linaro.org>
1 file changed