This script was basically an alias for `./hack/module.sh unittest`. We even
tell people to run the unit tests via module.sh in our contributing doc.
Let's ditch it - the best line of (shell code) is the one you don't write.
An analagous change was made in CI to use module.sh in place of test-unit.sh.
Signed-off-by: Andrew Keesler <akeesler@vmware.com>
fc3b4e9ae1