old_contents: INSTALLED_APPS = (
      'django.contrib.auth',
      'django.contrib.contenttypes',
      'django.contrib.sessions',
      'django.contrib.messages',
      'django.contrib.staticfiles',
  
      'djcelery',
      'django_keyerror',
      'template_tests',
      'rest_framework',
  
      'bidb.api',
      'bidb.keys',
      'bidb.packages',
      'bidb.buildinfo',
      'bidb.buildinfo.buildinfo_submissions',
      'bidb.static',
      'bidb.utils',
  )
  
new_contents: INSTALLED_APPS = (
      'django.contrib.auth',
      'django.contrib.contenttypes',
      'django.contrib.sessions',
      'django.contrib.messages',
      'django.contrib.staticfiles',
  
      'djcelery',
      'django_keyerror',
      'template_tests',
  
      'bidb.api',
      'bidb.keys',
      'bidb.packages',
      'bidb.buildinfo',
      'bidb.buildinfo.buildinfo_submissions',
      'bidb.static',
      'bidb.utils',
  )
  
subject: Drop (removed) rest_framework.