tests/vm: remove plain centos image

This isn't really used and we have lighter weight docker containers
for testing this stuff directly.

Reviewed-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240603175328.3823123-5-alex.bennee@linaro.org>
2 files changed