magic-removal: Removed BadCommand exception, which wasn't being used.

git-svn-id: http://code.djangoproject.com/svn/django/branches/magic-removal@2108 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/db/models/exceptions.py

@@ -3,6 +3,3 @@ class FieldDoesNotExist(Exception):
 
 class BadKeywordArguments(Exception):
     pass
-
-class BadCommand(Exception):
-    pass

django/db/models/manipulators.py

@@ -1,7 +1,6 @@
 from django.core.exceptions import ObjectDoesNotExist
 from django import forms
 from django.db.models.fields import FileField, AutoField
-from django.db.models.exceptions import BadCommand
 from django.dispatch import dispatcher
 from django.db.models import signals
 from django.utils.functional import curry