Revert "a11y: openlibhums#5105 update credit link markup for screen-readers"

This reverts commit 5681a4d.

Author: StephDriver

src/themes/OLH/templates/journal/article.html

@@ -480,13 +480,7 @@ <h2>{% trans "File Checksums" %} (MD5)</h2>
 
                         {% if journal_settings.general.use_credit and author.credits.exists %}
                           <div class="section hide-for-small-only">
-                            <h2>{% trans "CRediT Roles" %} 
-                                <a href="https://www.niso.org/publications/z39104-2022-credit" target="_blank">
-                                    <span class="sr-only">{% trans "Read more about Credit." %} </span>
-                                    <i aria-hidden="true" class="fa fa-info"></i>
-                                    {% include "elements/icons/link_external.html" %} 
-                                </a>
-                            </h2>
+                            <h2>{% trans "CRediT Roles" %} <a href="https://www.niso.org/publications/z39104-2022-credit" target="_blank"> <i class="fa fa-info"></i></a></h2>
                             <ul>
                               {% for author, credit_records in article.authors_and_credits.items %}
                                 <li>