don't complain about missing W&B when WANDB_DISABLED=true (#6036)

* don't complain about missing W&B when WANDB_DISABLED=true

* reformat to elif

* typo

src/transformers/trainer.py

@@ -203,7 +203,7 @@ class Trainer:
             )
         if is_wandb_available():
             self.setup_wandb()
-        else:
+        elif os.environ.get("WANDB_DISABLED") != "true":
             logger.info(
                 "You are instantiating a Trainer but W&B is not installed. To use wandb logging, "
                 "run `pip install wandb; wandb login` see https://docs.wandb.com/huggingface."

src/transformers/trainer_tf.py

@@ -90,7 +90,7 @@ class TFTrainer:
 
         if is_wandb_available():
             self._setup_wandb()
-        else:
+        elif os.environ.get("WANDB_DISABLED") != "true":
             logger.info(
                 "You are instantiating a Trainer but W&B is not installed. To use wandb logging, "
                 "run `pip install wandb; wandb login` see https://docs.wandb.com/huggingface."