Bugfix: Don't warn on using ``LocalExecutor`` (#18625)
Bugfix: Don't warn on using ``LocalExecutor`` (#18625)

The webserver showed the following error when using ``LocalExecutor``:

```
Do not use SequentialExecutor in production. Click here for more information.

```
nathanielvarona/airflow,apache/incubator-airflow,apache/airflow,nathanielvarona/airflow,apache/incubator-airflow,cfei18/incubator-airflow,mistercrunch/airflow,cfei18/incubator-airflow,apache/airflow,Acehaidrey/incubator-airflow,mistercrunch/airflow,apache/airflow,Acehaidrey/incubator-airflow,apache/airflow,lyft/incubator-airflow,cfei18/incubator-airflow,danielvdende/incubator-airflow,danielvdende/incubator-airflow,apache/airflow,bolkedebruin/airflow,bolkedebruin/airflow,apache/incubator-airflow,cfei18/incubator-airflow,lyft/incubator-airflow,cfei18/incubator-airflow,Acehaidrey/incubator-airflow,nathanielvarona/airflow,danielvdende/incubator-airflow,lyft/incubator-airflow,nathanielvarona/airflow,lyft/incubator-airflow,bolkedebruin/airflow,Acehaidrey/incubator-airflow,Acehaidrey/incubator-airflow,apache/incubator-airflow,apache/airflow,danielvdende/incubator-airflow,nathanielvarona/airflow,cfei18/incubator-airflow,danielvdende/incubator-airflow,Acehaidrey/incubator-airflow,bolkedebruin/airflow,bolkedebruin/airflow,mistercrunch/airflow,danielvdende/incubator-airflow,mistercrunch/airflow,nathanielvarona/airflow