Werk #13925: Drop dashboard "Checkmk server"

Component	User interface
Title	Drop dashboard "Checkmk server"
Date	Jun 27, 2022
Level	Trivial Change
Class	New Feature
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.2.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT 2.1.0p4 Checkmk Community, Checkmk Pro, Checkmk Ultimate MT

The "Checkmk server" dashboard is dropped. More informational overviews for Checkmk servers are available with the "Checkmk dashboard", as well as the linux specific dashboards "Linux hosts" and "Single Linux host".

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