clean_archive_title_cpt.php

<?php
echo post_type_archive_title( '', false );

clean_archive_titles.php

<?php
add_filter( 'get_the_archive_title', function ($title) {
  if ( is_category() ) {
    $title = single_cat_title( '', false );  // set $title to 'Category Title', but do not display
  } elseif ( is_tag() ) {
    $title = single_tag_title( '', false );  // set $title to 'Tag Title', but do not display
  } elseif ( is_author() ) {
    $title = '<span class="vcard">' . get_the_author() . '</span>' ;  // set $title to 'Author'
  }
  return $title;
});