Remove analytics dashboards from menu

Adam Hegyirequested to merge
379009-remove-dashboards-from-menu into master

What does this MR do and why?

This MR removes the Dashboards analytics menu from the sidebar. We're not ready to expose the menu item yet.

Skipping the changelog because the feature is still behind a FF.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

Related to #379009 (closed)

Edited by Adam Hegyi

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