Remove syn_max_lines, syn_prob_lines metrics

Closes #54 (closed)

dan/manager/metrics.py

@@ -152,8 +152,6 @@ class MetricManager:
                 "loss",
                 "loss_ctc",
                 "loss_ce",
-                "syn_max_lines",
-                "syn_prob_lines",
             ]:
                 value = float(
                     np.average(