Removed unused views in middleware_exceptions tests.

Unused since d334f46.

tests/middleware_exceptions/urls.py

@@ -4,12 +4,8 @@
 
 urlpatterns = [
     url(r'^middleware_exceptions/view/$', views.normal_view),
-    url(r'^middleware_exceptions/not_found/$', views.not_found),
     url(r'^middleware_exceptions/error/$', views.server_error),
-    url(r'^middleware_exceptions/null_view/$', views.null_view),
     url(r'^middleware_exceptions/permission_denied/$', views.permission_denied),
     url(r'^middleware_exceptions/exception_in_render/$', views.exception_in_render),
-
     url(r'^middleware_exceptions/template_response/$', views.template_response),
-    url(r'^middleware_exceptions/template_response_error/$', views.template_response_error),
 ]

tests/middleware_exceptions/views.py

@@ -1,5 +1,5 @@
 from django.core.exceptions import PermissionDenied
-from django.http import Http404, HttpResponse
+from django.http import HttpResponse
 from django.template import engines
 from django.template.response import TemplateResponse
 
@@ -13,23 +13,10 @@ def template_response(request):
     return TemplateResponse(request, template, context={'mw': []})
 
 
-def template_response_error(request):
-    template = engines['django'].from_string('{%')
-    return TemplateResponse(request, template)
-
-
-def not_found(request):
-    raise Http404()
-
-
 def server_error(request):
     raise Exception('Error in view')
 
 
-def null_view(request):
-    return None
-
-
 def permission_denied(request):
     raise PermissionDenied()