Remove ARIA attributes from taxonomy lists (google#1072)

Author: chalin

layouts/_default/taxonomy.html

@@ -10,9 +10,12 @@ <h1>{{ with .Data.Singular }}{{ . | humanize }}: {{ end }}<span>{{ .Title }}</sp
         {{ $manualLink := cond (isset .Params "manuallink") .Params.manualLink ( cond (isset .Params "manuallinkrelref") (relref . .Params.manualLinkRelref) .RelPermalink) }}
         <article class="card article-teaser article-type-{{ with .Type }}{{ ( urlize . ) }}{{ end }}">
           <h3><a href="{{ $manualLink }}"{{ with .Params.manualLinkTitle }} title="{{ . }}"{{ end }}{{ with .Params.manualLinkTarget }} target="{{ . }}"{{ if eq . "_blank" }} rel="noopener"{{ end }}{{ end }}>{{- .Title -}}</a></h3>
-          {{ if not .Site.Params.ui.taxonomy_breadcrumb_disable }}
-            {{- partial "breadcrumb.html" . -}}
-          {{ end }}
+          {{ if not .Site.Params.ui.taxonomy_breadcrumb_disable -}}
+            {{/* Use breadcrumb partial, but remove attributes that are invalid or inappropriate in this page-summary context. */ -}}
+            {{ partial "breadcrumb.html" .
+              | replaceRE ` aria-\w+=\".*?\"|(breadcrumb-item) active|(btn-link) disabled` "$1" | safeHTML
+            -}}
+          {{ end -}}
           <p>{{ .Description | markdownify }}</p>
           <header class="article-meta">
             {{ partial "taxonomy_terms_article_wrapper.html" . }}