Merge branch 'docs-remove-geo-redirects' into 'master'

Remove ancient geo redirects

See merge request gitlab-org/gitlab!44101

doc/gitlab-geo/after_setup.md

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doc/gitlab-geo/bring-primary-back.md

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doc/gitlab-geo/configuration.md

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doc/gitlab-geo/configuration_source.md

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doc/gitlab-geo/database.md

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doc/gitlab-geo/database_source.md

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doc/gitlab-geo/disaster-recovery.md

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doc/gitlab-geo/docker_registry.md

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doc/gitlab-geo/faq.md

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doc/gitlab-geo/ha.md

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doc/gitlab-geo/object_storage.md

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doc/gitlab-geo/planned-failover.md

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doc/gitlab-geo/security-review.md

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doc/gitlab-geo/ssh.md

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doc/gitlab-geo/troubleshooting.md

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doc/gitlab-geo/tuning.md

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doc/gitlab-geo/updating_the_geo_nodes.md

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doc/gitlab-geo/using_a_geo_server.md

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