remove deprecated wandb env var (#2751)

* remove deprecated wandb env var

* remove os.environ wandb setting; unused loggers

* remove os.environ wandb setting; unused loggers

tests/e2e/multigpu/test_ray.py

@@ -2,7 +2,6 @@
 E2E tests for multigpu post-training use Ray Train
 """
 
-import os
 from pathlib import Path
 
 import pytest
@@ -10,13 +9,9 @@ import yaml
 from accelerate.test_utils import execute_subprocess_async
 
 from axolotl.utils.dict import DictDefault
-from axolotl.utils.logging import get_logger
 
 from tests.e2e.utils import check_tensorboard, require_torch_lt_2_6_0
 
-LOG = get_logger(__name__)
-os.environ["WANDB_DISABLED"] = "true"
-
 AXOLOTL_ROOT = Path(__file__).parent.parent.parent.parent