Remove confusing messages for users

Problem/Motivation

When a user has permission to edit a node which has the queue enabled they are shown the following message:

The node was added to the Node Revision Delete queue.

This can be confusing to users who have no idea what a node is and therefore assume it's some sort of error message (although it's a status message)

Proposed resolution

Either:

1. Create a new permission so this message can be shown to specific roles, etc.
2. Remove the message completely as it provides no real benefit

There is a similar message when deleting a node which probably needs looking at too