Remove Nyx (arm)

We are shipping the tor-arm package but it is not mentionned anywhere in our documentation (thus #8915 (closed)). But do we really need it? Could we remove it?

Feature Branch: spriver:feature/9811-remove-arm

Related issues

Related to #8915 (closed)
Related to #8927

Original created by @sajolida on 9811 (Redmine)

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