[Fix] Fix `split` in Darts config (#451)

* fix split in DARTS config

* fix isort version

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Co-authored-by: gaoyang07 <1546308416@qq.com>

.pre-commit-config.yaml

@@ -4,8 +4,8 @@ repos:
     rev: 4.0.1
     hooks:
       - id: flake8
-  - repo: https://github.com/timothycrosley/isort
-    rev: 5.10.1
+  - repo: https://github.com/PyCQA/isort
+    rev: 5.11.5
     hooks:
       - id: isort
   - repo: https://github.com/pre-commit/mirrors-yapf

mmrazor/apis/mmcls/train.py

@@ -61,7 +61,7 @@ def train_mmcls_model(model,
     logger = get_root_logger()
     # Difference from mmclassification.
     # Split dataset.
-    if cfg.data.get('split', False):
+    if cfg.data.pop('split', False):
         train_dataset = dataset[0]
         dataset[0] = split_dataset(train_dataset)