Cleanup user journeys related configs and scripts (#18814)

layouts/partials/templates/user-journey-content.html

@@ -1,23 +0,0 @@
-<div class="track">{{ .Params.track }}</div>
-<div class="topheader">
-   Introduction
-</div>
-<div class="sections">sections in this doc</div>
-<div id="user-journeys-toc" class="tablebar">
-<!-- This TOC section is populated with Javascript, see js/user-journeys-toc.js -->
-</div>
-
-<div class="docsection1">
-
-{{ partial "templates/block" (dict "page" . "block" "overview" "purpose" "provides an introduction of this level.") }}
-
-{{- $capture := printf "__cid_%s" "body" -}}
-{{- $body := .Scratch.Get $capture -}}
-{{ with $body }}
-{{ $b := replace $body "<h2" "</div><h2" }}
-{{ $b := replace $b "</h2>" "</h2><div class=\"docsection1\"" }}
-{{ $b }}
-{{ end }}
-</div>
-
-<script src="{{ "js/user-journeys/toc.js" | relURL }}"></script>