chore: remove outdated part (#2141)

Signed-off-by: Anatolii Bazko <abazko@redhat.com>

modules/installation-guide/partials/proc_enabling-dev-workspace-engine.adoc

@@ -58,16 +58,6 @@ ifeval::["{project-context}" == "che"]
 [WARNING]
 ====
 * Before enabling {devworkspace} engine on existed Kubernetes-based {prod-short} installation, install cert-manager.
-
-* Enabling {devworkspace} engine on platforms other than OpenShift requires Kubernetes HTTP gateway to work in a regime when every authenticated {prod-short} user has the same privileges as {prod-short}-server service account. This approach is not recommended for production usage and served only for testing {devworkspace} engine capabilities.
-+
-. To enable Kubernetes HTTP gateway:
-+
-[subs="+attributes",options="nowrap",role=white-space-pre]
-----
-$ {orch-cli} patch checluster/{prod-checluster} -n {prod-namespace} --type=json -p \
-'{\"spec\":{\"server\":{\"customCheProperties\": {\"CHE_INFRA_KUBERNETES_ENABLE__UNSUPPORTED__K8S\": \"true\"}}}}'
-----
 ====
 endif::[]