hs: Remove hamrless BUG() that can happen

David Gouletrequested to merge
dgoulet/tor:ticket40334_045_01 into maint-0.4.5

When reloading a service, we can re-register a service and thus end up again in the metrics store initialization code path which is fine. No need to BUG() anymore.

Fixes #40334 (closed)

Signed-off-by: David Goulet dgoulet@torproject.org

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