[Metro-DR Stretch cluster] - table 4.1 entries "For arbiter" might be misleading

Table 4.1 contains descriptions about the pods to check for. Some comments contain "For arbiter,.."  which might be misleading, since it would suggest to check the arbiter node but simply is a relict from previous changes. This should be removed and only state "xx pods ....). 
The whole guide is about metro-DR stretched and thus would not require additional hints like this - nothing else is described here.)

Reported by: matthiasmuench

https://access.redhat.com/documentation/en-us/red_hat_openshift_data_foundation/4.9/html/configuring_openshift_data_foundation_for_metro-dr_stretch_cluster/verifying-openshift-data-foundation-deployment_rhodf#annotations:077dde5c-693d-4b11-8dd4-2e72bb8730a1