Revert "Make systemd public (#4297)" (#4301)
Revert "Make systemd public (#4297)" (#4301)

This reverts commit 1dd15f1e6d9869c57c272585f2fe6b1144cd8092.
DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core,DataDog/integrations-core