removed MetaMixin

1 job for django-guardian-support in 1 minute and 14 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
failed #10143
sib
test

00:01:14

 
Name Stage Failure
failed
test Test

----------------------------------------------------------------------
Ran 8 tests in 0.880s

FAILED (errors=3)
Creating test database for alias 'default'...
System check identified no issues (0 silenced).
Destroying test database for alias 'default'...
ERROR: Job failed: exit code 1