old_contents: from django.contrib import admin
  from tastypie.models import ApiKey
  from rest_api.models import Url
  
  class ApiKeyAdmin(admin.ModelAdmin):
      pass
  
  admin.site.register(ApiKey, ApiKeyAdmin)
  
  
  class UrlAdmin(admin.ModelAdmin):
      pass
  
  admin.site.register(Url)
  
new_contents: from django.contrib import admin
  
  from tastypie.models import ApiKey
  
  
  class ApiKeyAdmin(admin.ModelAdmin):
      pass
  
  admin.site.register(ApiKey, ApiKeyAdmin)
  
subject: Remove Url model from admin