### Apache Airflow version

Other Airflow 2 version (please specify below)

### What happened

ON Airflow 2.4.2 Dag dependencies graph show deleted DAGs that use to have dependencies to currently existing DAGs

### What you think should happen instead

Deleted DAGs should not appear on DAG Dependencies

### How to reproduce

Create a DAG with dependencies on other DAG, like a wait sensor.
Remove new DAG

### Operating System

apache/airflow:2.4.2-python3.10

### Versions of Apache Airflow Providers

_No response_

### Deployment

Official Apache Airflow Helm Chart

### Deployment details

_No response_

### Anything else

_No response_

### Are you willing to submit PR?

- [ ] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

"""Checks a DAG exist in serialized_dag table.
        :param dag_id: the DAG to check
        :param session: ORM Session
        """
        return session.query(literal(True)).filter(cls.dag_id == dag_id).first() is not None
    @classmethod
    @provide_session
    def get_dag(cls, dag_id: str, session: Session = None) -> SerializedDAG | None: