slapos-master/test: delete wsgi tests

We only support wsgi now.

TODO: revert slapos.package@63da524b
3 jobs for zope4py2 in 0 seconds
Status Job ID Name Coverage
  External
failed ERP5.CodingStyleTest-Zope4Py2

01:07:45

failed ERP5.UnitTest-Zope4Py2

01:14:29

failed SlapOS.SoftwareReleases.IntegrationTest-Zope4Py2

02:56:50