software/kvm: Drop the simplified schema version

  This feature isn't used anymore. We support a two schema per software
type (at most):

    One for Software Instance
    One for Shared instance
7 jobs for beremiz in 0 seconds
Status Job ID Name Coverage
  External
passed SlapOS.Eggs.UnitTest-Master.Python2

00:12:42

passed SlapOS.Eggs.UnitTest-Master.Python3

00:14:06

passed SlapOS.SlapRunner.ResilienceTest-Master

00:21:50

failed SlapOS.SlapRunner.ResilienceTest-Master.ERP5

01:28:24

failed SlapOS.SoftwareReleases.IntegrationTest-Master.Python2

failed SlapOS.SoftwareReleases.IntegrationTest-Master.Python3

passed Wendelin.StandaloneDeploymentScriptTest-Debian.Buster.Master