test_out.sh: remove non-necessary hg checkout
test_out.sh: remove non-necessary hg checkout

Signed-off-by: Andreas Fleig <e85e832e00ffb69c900dd6dadaef1d8c508f90e6@pivotal.io>

andreasf/hg-resource,andreasf/hg-resource,concourse/hg-resource,concourse/hg-resource