ashb opened a new pull request, #23291:
URL: https://github.com/apache/airflow/pull/23291
This reverts commit ace8c6e942ff5554639801468b971915b7c0e9b9.
Fixes apache/airflow#23285
This dag breaks with a cycle as group.end has itself as a downstream
otherwise:
```python
from pendulum import datetime
from airflow.decorators import dag, task, task_group
from airflow.utils.edgemodifier import Label
@task
def begin():
...
@task
def end():
...
@dag(start_date=datetime(2022, 1, 1), schedule_interval=None)
def task_groups_with_edge_labels():
@task_group
def group():
begin() >> end()
group()
_ = task_groups_with_edge_labels()
```
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