How to disable feature toggle that is enabled by default

We run Grafana 10.1.1 on AWS ECS and would like to disable Redshift ASync Query which appeared to be turned on by default.

I am not able to disable this feature using the docker environment variable
- Name: GF_FEATURE_TOGGLES_REDSHIFTASYNCQUERYDATASUPPORT
Value: false

Is this possible or do I need to edit grafana.ini to turn this off?