[fix] fix workflow

Author: duanjunwen

.github/workflows/doc_check_on_pr.yml

@@ -74,5 +74,3 @@ jobs:
           pip install -v ./doc-build/third_party/hf-doc-builder
           pip install -v ./doc-build
           bash ./scripts/build.sh
-        list: |
-          from colossalai.shardformer import ShardConfig