(maint) remove unused serverspec gem dependency
(maint) remove unused serverspec gem dependency

MelanieGault/puppetlabs-registry,ferventcoder/puppetlabs-registry,DSI-Ville-Noumea/puppetlabs-registry,cyberious/puppetlabs-registry,jpogran/puppetlabs-registry,zshahan/puppetlabs-registry,puppetlabs/puppetlabs-registry