LOGGER consolidation (#5569)

* Logger consolidation

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

train.py

@@ -7,7 +7,6 @@ Usage:
 """
 
 import argparse
-import logging
 import math
 import os
 import random
@@ -201,8 +200,8 @@ def train(hyp,  # path/to/hyp.yaml or hyp dictionary
 
     # DP mode
     if cuda and RANK == -1 and torch.cuda.device_count() > 1:
-        logging.warning('DP not recommended, instead use torch.distributed.run for best DDP Multi-GPU results.\n'
-                        'See Multi-GPU Tutorial at https://github.com/ultralytics/yolov5/issues/475 to get started.')
+        LOGGER.warning('WARNING: DP not recommended, use torch.distributed.run for best DDP Multi-GPU results.\n'
+                       'See Multi-GPU Tutorial at https://github.com/ultralytics/yolov5/issues/475 to get started.')
         model = torch.nn.DataParallel(model)
 
     # SyncBatchNorm