Thanks to https://github.com/eclipse-che/che-dashboard/pull/431 kubeconfig file should be injected in each container in the workspace Pod. It means that we don't need openshift-auth plugin to get the token (automatically login into the OS cluster).

So, we can remove che-theia-openshift-auth plugin and dependency on it from  vscode-openshift-connector.

Upstream issue: https://github.com/eclipse/che/issues/20857