Removed configuration section from volumes.

As it is outdated and also doesn't belong as part of the conceptual explanation of what a volume is. #43809

Author: Rohan Kapse

content/en/docs/concepts/storage/volumes.md

@@ -1234,24 +1234,7 @@ in `Container.volumeMounts`. Its values are:
   (unmounted) by the containers on termination.
   {{< /warning >}}
 
-### Configuration
 
-Before mount propagation can work properly on some deployments (CoreOS,
-RedHat/Centos, Ubuntu) mount share must be configured correctly in
-Docker as shown below.
-
-Edit your Docker's `systemd` service file. Set `MountFlags` as follows:
-
-```shell
-MountFlags=shared
-```
-
-Or, remove `MountFlags=slave` if present. Then restart the Docker daemon:
-
-```shell
-sudo systemctl daemon-reload
-sudo systemctl restart docker
-```
 
 ## {{% heading "whatsnext" %}}