remove docker flag from all scout sub-commands

Created by: jasonhawkharris

The docker flag also only worked if run from the machine where the Sourcegraph instance was running. We would have to start shipping docker compose instances of sourcegraph with a built in version of src to run it. We want to move towards deprecating docker-compose deployments, so I am removing it from scout

Test plan

Tested manually once all artifacts of docker flag were removed.