Remove codes about the training_data (#2512)

Author: workingloong

elasticai_api/common/data_shard_service.py

@@ -71,7 +71,7 @@ def __init__(
         self._report_training_params()
 
     def _report_training_params(self):
-        if self._num_epochs and (self._dataset_size or self._training_data):
+        if self._num_epochs and self._dataset_size:
             self._mc.report_training_params(
                 batch_size=self._batch_size,
                 num_epochs=self._num_epochs,