remove duplicated train

src/main.py

@@ -53,14 +53,11 @@ def main():
     estimator_config = tf.estimator.RunConfig(session_config=session_config)
 
     model = tf.estimator.Estimator(model_fn=esmm_model_fn, params=params, model_dir=model_path, config=estimator_config)
-    train_spec = tf.estimator.TrainSpec(input_fn=lambda: esmm_input_fn(train_df, shuffle=True), max_steps=50000)
+    # TODO 50000
+    train_spec = tf.estimator.TrainSpec(input_fn=lambda: esmm_input_fn(train_df, shuffle=True), max_steps=20000)
     eval_spec = tf.estimator.EvalSpec(input_fn=lambda: esmm_input_fn(val_df, shuffle=False))
     tf.estimator.train_and_evaluate(model, train_spec, eval_spec)
 
-    model.train(input_fn=lambda: esmm_input_fn(train_df, shuffle=True))
-    metrics = model.evaluate(input_fn=lambda: esmm_input_fn(val_df, False))
-    print("metrics: " + str(metrics))
-
     model_export_path = str(Path("~/data/models/").expanduser())
     save_path = model_export(model, all_features, model_export_path)
     print("save to: " + save_path)