Remove the SLIs for the public Grafana Dasbhoards

Bob Van Landuytrequested to merge
bvl-remove-public-grafana-slis into master

We currently don't host them, so the metrics are empty. Remove the noise from the recordings and dashbhoards.

More info in: https://gitlab.com/gitlab-com/gl-infra/infrastructure/-/issues/14432

Extracted from: !4338 (closed)

Edited by Bob Van Landuyt

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