diff --git a/solr/CHANGES.txt b/solr/CHANGES.txt
index 6340ca34cf4..b4026250be1 100644
--- a/solr/CHANGES.txt
+++ b/solr/CHANGES.txt
@@ -236,6 +236,8 @@ Other Changes
 
 * SOLR-9588: Remove Guava dependency from SolrJ (Ishan Chattopadhyaya, noble)
 
+* SOLR-8140: Remove mentions of unimplemented admin-extra from the new Admin UI (Alexandre Rafalovitch)
+
 ==================  6.2.1 ==================
 
 Bug Fixes
diff --git a/solr/core/src/java/org/apache/solr/handler/component/SpellCheckComponent.java b/solr/core/src/java/org/apache/solr/handler/component/SpellCheckComponent.java
index 9b510fed665..49662375cd7 100644
--- a/solr/core/src/java/org/apache/solr/handler/component/SpellCheckComponent.java
+++ b/solr/core/src/java/org/apache/solr/handler/component/SpellCheckComponent.java
@@ -728,7 +728,7 @@ public class SpellCheckComponent extends SearchComponent implements SolrCoreAwar
 
       //ensure that there is at least one query converter defined
       if (queryConverters.size() == 0) {
-        LOG.info("No queryConverter defined, using default converter");
+        LOG.trace("No queryConverter defined, using default converter");
         queryConverters.put("queryConverter", new SpellingQueryConverter());
       }
 
diff --git a/solr/webapp/web/css/angular/dashboard.css b/solr/webapp/web/css/angular/dashboard.css
index c681bc862ae..734d62a9de6 100644
--- a/solr/webapp/web/css/angular/dashboard.css
+++ b/solr/webapp/web/css/angular/dashboard.css
@@ -123,11 +123,6 @@ limitations under the License.
   margin-top: 10px;
 }
 
-#content #dashboard #admin-extra
-{
-  float: left;
-}
-
 #content #dashboard #healthcheck
 {
   float: right;
@@ -152,7 +147,6 @@ limitations under the License.
 #content #dashboard #replication.master h2 { background-image: url( ../../img/ico/node-master.png ); }
 #content #dashboard #replication.slave h2 { background-image: url( ../../img/ico/node-slave.png ); }
 #content #dashboard #instance h2 { background-image: url( ../../img/ico/server.png ); }
-#content #dashboard #admin-extra h2 { background-image: url( ../../img/ico/plus-button.png ); }
 #content #dashboard #collection h2 { background-image: url( ../../img/ico/book-open-text.png ); }
 #content #dashboard #shards h2 { background-image: url( ../../img/ico/documents-stack.png ); }
 
@@ -182,4 +176,4 @@ limitations under the License.
 
 #dashboard #shards .shard .replica.odd {
     background-color: #fff;
-}
\ No newline at end of file
+}
diff --git a/solr/webapp/web/js/angular/controllers/core-overview.js b/solr/webapp/web/js/angular/controllers/core-overview.js
index 710e6f24269..20f30e12bd8 100644
--- a/solr/webapp/web/js/angular/controllers/core-overview.js
+++ b/solr/webapp/web/js/angular/controllers/core-overview.js
@@ -139,86 +139,3 @@ function($scope, $rootScope, $routeParams, Luke, CoreSystem, Update, Replication
   $scope.refresh();
 });
 
-/*******
-
-// @todo admin-extra
-    var core_basepath = this.active_core.attr( 'data-basepath' );
-    var content_element = $( '#content' );
-
-    content_element
-      .removeClass( 'single' );
-
-    if( !app.core_menu.data( 'admin-extra-loaded' ) )
-    {
-      app.core_menu.data( 'admin-extra-loaded', new Date() );
-
-      $.get
-      (
-        core_basepath + '/admin/file/?file=admin-extra.menu-top.html&contentType=text/html;charset=utf-8',
-        function( menu_extra )
-        {
-          app.core_menu
-            .prepend( menu_extra );
-        }
-      );
-
-      $.get
-      (
-        core_basepath + '/admin/file/?file=admin-extra.menu-bottom.html&contentType=text/html;charset=utf-8',
-        function( menu_extra )
-        {
-          app.core_menu
-            .append( menu_extra );
-        }
-      );
-    }
-
-
-
-////////////////////////////////// ADMIN EXTRA
-        $.ajax
-        (
-          {
-            url : core_basepath + '/admin/file/?file=admin-extra.html',
-            dataType : 'html',
-            context : $( '#admin-extra', dashboard_element ),
-            beforeSend : function( xhr, settings )
-            {
-              $( 'h2', this )
-                .addClass( 'loader' );
-
-              $( '.message', this )
-                .show()
-                .html( 'Loading' );
-
-              $( '.content', this )
-                .hide();
-            },
-            success : function( response, text_status, xhr )
-            {
-              $( '.message', this )
-                .hide()
-                .empty();
-
-              $( '.content', this )
-                .show()
-                .html( response );
-            },
-            error : function( xhr, text_status, error_thrown)
-            {
-              this
-                .addClass( 'disabled' );
-
-              $( '.message', this )
-                .show()
-                .html( 'We found no "admin-extra.html" file.' );
-            },
-            complete : function( xhr, text_status )
-            {
-              $( 'h2', this )
-                .removeClass( 'loader' );
-            }
-          }
-        );
-
-***/
diff --git a/solr/webapp/web/partials/core_overview.html b/solr/webapp/web/partials/core_overview.html
index 5f86221d32b..3b92fc31470 100644
--- a/solr/webapp/web/partials/core_overview.html
+++ b/solr/webapp/web/partials/core_overview.html
@@ -205,23 +205,6 @@ limitations under the License.
     </div>
 
   </div>
-  <div class="clearfix">
-
-    <div class="block" id="admin-extra">
-
-      <h2><span>Admin Extra</span></h2>
-
-      <div class="message-container">
-        <div class="message"></div>
-      </div>
-
-      <div class="content">
-
-      </div>
-
-    </div>
-
-  </div>
 
 
 </div>