fix: don't invoke postprocess_gapic_library_hermetic() when there are no versions to post process (#1093)
fix: don't invoke postprocess_gapic_library_hermetic() when there are no versions to post process (#1093)

Fixes https://github.com/googleapis/repo-automation-bots/issues/1600
googleapis/synthtool,googleapis/synthtool,googleapis/synthtool,googleapis/synthtool,googleapis/synthtool