Drop the py2 test

- we don't need this anymore
4 jobs for 167-django-two-dot-oh in 2 minutes and 20 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Test
passed #4488
Go-py3.4

00:01:13

passed #4489
Go-py3.5

00:01:17

passed #4490
Go-py3.6

00:01:18

72.0%
 
  Lint
passed #4491
Go-flake8

00:01:01