CI: Remove unsupported Django versions from CI pipeline

4 jobs for devel in 11 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Test
passed #87157
py27-django111

00:00:09

passed #87158
py36-django111

00:00:10

passed #87159
py36-django21

00:00:10

passed #87160
py36-django22

00:00:10