urls.py: PEP8

Fixes: c626d5ea ("Add robots.txt")
Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>

patchwork/urls.py

@@ -78,7 +78,8 @@ patch_results_router.register(r'test-results', api.PatchResultViewSet,
 admin.autodiscover()
 
 urlpatterns = [
-    path('robots.txt', TemplateView.as_view(template_name="robots.txt", content_type="text/plain"), name="robots_file"),
+    path('robots.txt', TemplateView.as_view(template_name="robots.txt",
+                                            content_type="text/plain")),
 
     path('admin/', admin.site.urls),