Move the youtube shortcode to the termlite theme

Rename it figures/youtube → youtube and update the posts that use it.

layouts/shortcodes/figures/youtube.html

@@ -1,12 +0,0 @@
-{{- $pc := .Page.Site.Config.Privacy.YouTube -}}
-{{- if not $pc.Disable -}}
-{{- $ytHost := cond $pc.PrivacyEnhanced  "www.youtube-nocookie.com" "www.youtube.com" -}}
-{{- $id := .Get "id" | default (.Get 0) -}}
-{{- $class := .Get "class" | default (.Get 1) -}}
-{{- $title := .Get "title" | default "YouTube Video" }}
-<figure {{ with $class }}class="{{ . }}"{{ end }}>
-  <div class="youtube">
-    <iframe src="https://{{ $ytHost }}/embed/{{ $id }}{{ with .Get "autoplay" }}{{ if eq . "true" }}?autoplay=1{{ end }}{{ end }}" allowfullscreen frameborder=0 title="{{ $title }}"></iframe>
-  </div>
-</figure>
-{{ end -}}