docs: T3871: drop hw-id from the example outputT3871-ifname-store

The node is gone from the CLI, so example configuration dumps which still
show it no longer match what a reader sees on their own system. Remove it
from the shown output only; no prose changes. The comparison shown on the
testing page is rewritten rather than trimmed, as deleting the lines would
have left an edit level behind with nothing under it.

0 files changed, 0 insertions, 0 deletions