diff --git a/core/modules/filter/src/Plugin/Filter/FilterHtml.php b/core/modules/filter/src/Plugin/Filter/FilterHtml.php
index 9d6d70f..af85bd6 100644
--- a/core/modules/filter/src/Plugin/Filter/FilterHtml.php
+++ b/core/modules/filter/src/Plugin/Filter/FilterHtml.php
@@ -203,21 +203,6 @@ public function getHTMLRestrictions() {
       }
     }
 
-    // When <a> is allowed and the nofollow setting is enabled, and the rel
-    // attribute is not already generically allowed, then whitelist the 'rel'
-    // attribute, but only allow the 'nofollow' value.
-    if ($this->settings['filter_html_nofollow'] && isset($restrictions['allowed']['a']) && $restrictions['allowed']['a'] !== TRUE) {
-      // If previously no attributes were allowed on <a>, that is now changing.
-      if ($restrictions['allowed']['a'] === FALSE) {
-        $restrictions['allowed']['a'] = [];
-      }
-      // If the 'rel' attribute is not yet whitelisted, then do so now.
-      if (!isset($restrictions['allowed']['a']['rel'])) {
-        $restrictions['allowed']['a']['rel'][] = 'nofollow';
-        $restrictions['allowed']['a']['rel'] = array_unique($restrictions['allowed']['a']['rel']);
-      }
-    }
-
     // The 'style' and 'on*' ('onClick' etc.) attributes are always forbidden,
     // and are removed by Xss::filter().
     // The 'id', 'lang', and 'dir' attributes apply to all elements and are