delete unuseful log

recommend-model-produce/src/main/python/tools/static_ps_trainer_v2.py

@@ -267,7 +267,7 @@ class Main(object):
             "Epoch {} Var {}".format(epoch, var_name)
             for var_name in self.metrics
         ]
-
+        logger.info("Epoch: {},{}, Running Dataset Begin.".format(epoch,self.metrics))
         fetch_vars = [var for _, var in self.metrics.items()]
 
         print_step = int(config.get("runner.print_interval"))