Update support-providing-diagnostic-data-to-red-hat.adoc

Remove the step by remove the steps in Upload diagnostic data to an existing Red Hat support case directly from an {product-title} cluster directly since  the redhat-support-tool has been deprecated in RHEL 8 and will not be shipped in RHEL 9 onwards

Author: Shubhampwrredhat

modules/support-providing-diagnostic-data-to-red-hat.adoc

@@ -49,51 +49,3 @@ endif::openshift-rosa,openshift-dedicated[]
 +
 . Select *Attach files* and follow the prompts to upload the file.
 
-* Upload diagnostic data to an existing Red Hat support case directly from an {product-title} cluster.
-. Obtain a list of cluster nodes:
-+
-[source,terminal]
-----
-$ oc get nodes
-----
-
-. Enter into a debug session on the target node. This step instantiates a debug pod called `<node_name>-debug`:
-+
-[source,terminal]
-----
-$ oc debug node/my-cluster-node
-----
-+
-. Set `/host` as the root directory within the debug shell. The debug pod mounts the host's root file system in `/host` within the pod. By changing the root directory to `/host`, you can run binaries contained in the host's executable paths:
-+
-[source,terminal]
-----
-# chroot /host
-----
-+
-ifndef::openshift-rosa,openshift-dedicated[]
-[NOTE]
-====
-{product-title} {product-version} cluster nodes running {op-system-first} are immutable and rely on Operators to apply cluster changes. Accessing cluster nodes by using SSH is not recommended. However, if the {product-title} API is not available, or the kubelet is not properly functioning on the target node, `oc` operations will be impacted. In such situations, it is possible to access nodes using `ssh core@<node>.<cluster_name>.<base_domain>` instead.
-====
-+
-endif::openshift-rosa,openshift-dedicated[]
-. Start a `toolbox` container, which includes the required binaries to run `redhat-support-tool`:
-+
-[source,terminal]
-----
-# toolbox
-----
-+
-[NOTE]
-====
-If an existing `toolbox` pod is already running, the `toolbox` command outputs `'toolbox-' already exists. Trying to start...`. Remove the running toolbox container with `podman rm toolbox-` and spawn a new toolbox container, to avoid issues.
-====
-+
-.. Run `redhat-support-tool` to attach a file from the debug pod directly to an existing Red Hat Support case. This example uses support case ID '01234567' and example file path `/host/var/tmp/my-diagnostic-data.tar.gz`:
-+
-[source,terminal]
-----
-# redhat-support-tool addattachment -c 01234567 /host/var/tmp/my-diagnostic-data.tar.gz <1>
-----
-<1> The toolbox container mounts the host's root directory at `/host`. Reference the absolute path from the toolbox container's root directory, including `/host/`, when specifying files to upload through the `redhat-support-tool` command.