removed reference to PRE_INITIALIZED training strategy

Author: davidsebfischer

batchglm/train/tf/base_glm_all/estimator.py

@@ -336,10 +336,7 @@ def train_sequence(self, training_strategy):
             training_strategy = self.TrainingStrategy[training_strategy].value
 
         if training_strategy is None:
-            if not self._train_loc:
-                training_strategy = self.TrainingStrategy.PRE_INITIALIZED.value
-            else:
-                training_strategy = self.TrainingStrategy.DEFAULT.value
+            training_strategy = self.TrainingStrategy.DEFAULT.value
 
         logger.info("training strategy:\n%s", pprint.pformat(training_strategy))