Remove a TODO that no longer applies

The removed TODO was talking about USE_SYSTEMD, not WSGI_MODE.

WSGI_MODE makes sense, so the TODO has been done.

Change-Id: Ib574ef123ea4c82d4d88012c990cd1ad660d7879
diff --git a/lib/placement b/lib/placement
index fd09cd8..4755a58 100644
--- a/lib/placement
+++ b/lib/placement
@@ -122,8 +122,7 @@
     if [ "$PLACEMENT_DB_ENABLED" != False ]; then
         iniset $PLACEMENT_CONF placement_database connection `database_connection_url placement`
     fi
-    # TODO(sdague): this really should flag off of something else, but
-    # it won't really work without systemd today.
+
     if [[ "$WSGI_MODE" == "uwsgi" ]]; then
         write_uwsgi_config "$PLACEMENT_UWSGI_CONF" "$PLACEMENT_UWSGI" "/placement"
     else