Removed unneeded imports from the Solr backend.

Author: toastdriven

haystack/backends/solr_backend.py

@@ -3,12 +3,10 @@
 from django.conf import settings
 from django.core.exceptions import ImproperlyConfigured
 from django.db.models.loading import get_model
-from django.utils.encoding import force_unicode
 from haystack.backends import BaseSearchBackend, BaseSearchQuery, log_query
 from haystack.exceptions import MissingDependency, MoreLikeThisError
-from haystack.fields import DateField, DateTimeField, IntegerField, FloatField, BooleanField, MultiValueField
 from haystack.models import SearchResult
-from haystack.utils import get_identifier, get_facet_field_name
+from haystack.utils import get_identifier
 try:
     set
 except NameError: