Remove flaking command sync unit tests
Remove flaking command sync unit tests

Since we split-up the streams for stdout and stderr we cannot guarantee
which writer will be written first. The unit test therefore tends to
flake in certain environments.

A solution around this could be to unify stderr and stdout, but this
would be a breaking API change.

Signed-off-by: Sascha Grunert <70ab469ddb2ac3e35f32ed7c2fd1cca514b2e879@suse.com>

kubernetes/release,kubernetes/release