Remove ambiguous selectors (???) from latency-charter.py
Remove ambiguous selectors (???) from latency-charter.py

lucasallan/boulder,jfrazelle/boulder,lucasallan/boulder,letsencrypt/boulder,jcjones/boulder,jcjones/boulder,jcjones/boulder,lucasallan/boulder,ibukanov/boulder,jcjones/boulder,bmw/boulder,bmw/boulder,jfrazelle/boulder,jsha/boulder,jfrazelle/boulder,jsha/boulder,letsencrypt/boulder,jsha/boulder,ibukanov/boulder,bmw/boulder,letsencrypt/boulder,ibukanov/boulder,jfrazelle/boulder