Resolve snippet that only contains a single item

[maximiliankolb]

What changes are you introducing?

This patch drops a snippet that only contains a single unordered list item. Instead, the two lines are now part of the three modules that included the snippet before.

Why are you introducing these changes? (Explanation, links to references, issues, etc.)

I think that we do not need a snippet for a single line. Open for feedback on this!

Anything else to add? (Considerations, potential downsides, alternative solutions you have explored, etc.)

Doesn't every host belong to exactly one domain and one subnet? It cannot be at two places at the same time, can it?

If anyone knows this: why does only GCE include this snippet? What about all other clouds? What about virtualization solutions?

• https://docs.theforeman.org/nightly/Provisioning_Hosts/index-katello.html#Network_Boot_Provisioning_Workflow_using-network-boot -> network boot needs a domain + subnet
• https://docs.theforeman.org/nightly/Provisioning_Hosts/index-katello.html#creating-image-only-hosts-by-using-web-ui_azure-provisioning -> Azure seems to need that too

If we notice that this snippet would make sense for all compute resources, then I would revert it and include it where appropriate.

Contributor checklists

• I am okay with my commits getting squashed when you merge this PR.
• I am familiar with the contributing guidelines.

Please cherry-pick my commits into:

• Foreman 3.18/Katello 4.20 (Satellite 6.19)
• Foreman 3.17/Katello 4.19
• Foreman 3.16/Katello 4.18 (Satellite 6.18; orcharhino 7.6 and 7.7)
• Foreman 3.15/Katello 4.17
• Foreman 3.14/Katello 4.16 (Satellite 6.17; orcharhino 7.4; orcharhino 7.5)
• Foreman 3.13/Katello 4.15 (EL9 only)
• Foreman 3.12/Katello 4.14 (Satellite 6.16; orcharhino 7.2 on EL9 only; orcharhino 7.3)
• We do not accept PRs for Foreman older than 3.12.

[github-actions]

The PR preview for b8a3516 is available at theforeman-foreman-documentation-preview-pr-4764.surge.sh

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