RHDIP-8198: removed obsolete doc files

[deerskindoll]

IMPORTANT: Do Not Merge - To be merged by Docs Team Only

Version(s):

main, 1.8, TBD (based on scope of migration)

Issue:

https://issues.redhat.com/browse/RHIDP-8198

Preview:

[rhdh-bot]

Updated preview: https://redhat-developer.github.io/red-hat-developers-documentation-rhdh/pr-1406/ @ 09/24/25 20:10:22

[themr0c]

I see no errors in the build https://github.com/redhat-developer/red-hat-developers-documentation-rhdh/actions/runs/17973822914/job/51122547712?pr=1406

It is sufficient to prove files are not in use.

If an include statement would fail, ccutil would fail with an error such as:

Building titles/setting-up-and-configuring-your-first-red-hat-developer-hub-instance/master.adoc into titles-generated/main/setting-up-and-configuring-your-first-red-hat-developer-hub-instance ...
  podman run --interactive --rm --tty \
    --volume /home/ffloreth/src/gh/themr0c/red-hat-developers-documentation-rhdh:/docs:Z \
    --workdir /docs/titles/setting-up-and-configuring-your-first-red-hat-developer-hub-instance \
    quay.io/ivanhorvath/ccutil:amazing ccutil compile --format html-single --lang en-US --doctype article
Transforming the AsciiDoc content to DocBook XML...
asciidoctor: ERROR: assemblies/assembly-enabling-authentication-with-mandatory-steps-only.adoc: line 7: include file not found: /docs/titles/setting-up-and-configuring-your-first-red-hat-developer-hub-instance/assemblies/modules/authentication/con-understanding-authentication-and-user-provisioning.adorc                                                        
mv: cannot stat 'titles/setting-up-and-configuring-your-first-red-hat-developer-hub-instance/build/tmp/en-US/html-single/': No such file or directory

[deerskindoll]

full list of unused content:

assembly-release-notes-fixed-issues.adoc (TBD)
assembly-release-notes-known-issues.adoc (TBD)
assembly-rhdh-integration-aks.adoc
assembly-upgrade-rhdh.adoc
assembly-about-rhdh-plugins.adoc
assembly-reference-rhdh-plugins.adoc
proc-mount-directories-pvcs.adoc
procedure-understanding-no-proxy.adoc
conscious-language.adoc
proc-techdocs-config-cicd-prep-repo.adoc
proc-techdocs-generate-site.adoc
proc-techdocs-publish-site.adoc
ref-community-plugins.template.adoc (won't delete)
ref-rh-supported-plugins.template.adoc (won't delete)
ref-rh-tech-preview-plugins.template.adoc (won't delete)
rhdh-supported-plugins.csv (won't delete)
proc-enable-signin.adoc
con-audit-log-track-changes-catalog.adoc
con-openshift-ai.adoc

[themr0c]

Can you also remove assembly-release-notes-fixed-issues.adoc assembly-release-notes-known-issues.adoc procedure-understanding-no-proxy.adoc, and then, you can merge.