Log message about "variables" command being deprecated

[tomyedwab]

Apache Airflow version: 1.10.14

Kubernetes version (if you are using kubernetes) (use kubectl version):

Environment:

• Cloud provider or hardware configuration:
• OS (e.g. from /etc/os-release): OSX 10.15.7
• Kernel (e.g. uname -a):
• Install tools:
• Others:

What happened:

Saw this message in the logs:
The 'variables' command is deprecated and removed in Airflow 2.0, please use 'variables' instead

What you expected to happen:
If this is a legitimate error, it should be more helpful.

How to reproduce it:

pip install apache-airflow[postgres]==1.10.14
airflow db init
airflow variables

Anything else we need to know:

This happens in production on GKE as well.

[boring-cyborg]

Thanks for opening your first issue here! Be sure to follow the issue template!

[ashb]

Whoops, yes, that should have said something about use variables list instead.

[kaxil]

closed by #14457