diff --git a/phpBB/adm/style/acp_posting_buttons.html b/phpBB/adm/style/acp_posting_buttons.html
index 9055bc3240..fd07f7499b 100644
--- a/phpBB/adm/style/acp_posting_buttons.html
+++ b/phpBB/adm/style/acp_posting_buttons.html
@@ -11,11 +11,9 @@
 {% include 'mentions_templates.html' %}
 
 <!-- INCLUDEJS {T_ASSETS_PATH}/javascript/editor.js -->
-<!-- INCLUDEJS {T_ASSETS_PATH}/javascript/tribute.min.js -->
-<!-- INCLUDEJS {T_ASSETS_PATH}/javascript/mentions.js -->
 
 <!-- EVENT acp_posting_buttons_before -->
-<div id="format-buttons"<!-- IF S_ALLOW_MENTIONS --> data-mention-url="{U_MENTION_URL}" data-mention-names-limit="{S_MENTION_NAMES_LIMIT}" data-topic-id="{S_TOPIC_ID}" data-user-id="{S_USER_ID}"<!-- ENDIF -->>
+<div id="format-buttons">
 	<input type="button" class="button2" accesskey="b" name="addbbcode0" value=" B " style="font-weight:bold; width: 30px" onclick="bbstyle(0)" title="{L_BBCODE_B_HELP}" />
 	<input type="button" class="button2" accesskey="i" name="addbbcode2" value=" i " style="font-style:italic; width: 30px" onclick="bbstyle(2)" title="{L_BBCODE_I_HELP}" />
 	<input type="button" class="button2" accesskey="u" name="addbbcode4" value=" u " style="text-decoration: underline; width: 30px" onclick="bbstyle(4)" title="{L_BBCODE_U_HELP}" />
diff --git a/phpBB/includes/functions_acp.php b/phpBB/includes/functions_acp.php
index fda0811007..9a1d4b6a70 100644
--- a/phpBB/includes/functions_acp.php
+++ b/phpBB/includes/functions_acp.php
@@ -24,7 +24,7 @@ if (!defined('IN_PHPBB'))
 */
 function adm_page_header($page_title)
 {
-	global $config, $user, $template, $auth;
+	global $config, $user, $template;
 	global $phpbb_root_path, $phpbb_admin_path, $phpEx, $SID, $_SID;
 	global $phpbb_dispatcher, $phpbb_container;
 
@@ -66,9 +66,6 @@ function adm_page_header($page_title)
 		}
 	}
 
-	/** @var \phpbb\controller\helper $controller_helper */
-	$controller_helper = $phpbb_container->get('controller.helper');
-
 	$phpbb_version_parts = explode('.', PHPBB_VERSION, 3);
 	$phpbb_major = $phpbb_version_parts[0] . '.' . $phpbb_version_parts[1];
 
@@ -89,10 +86,6 @@ function adm_page_header($page_title)
 		'U_ADM_INDEX'			=> append_sid("{$phpbb_admin_path}index.$phpEx"),
 		'U_INDEX'				=> append_sid("{$phpbb_root_path}index.$phpEx"),
 
-		'S_ALLOW_MENTIONS'		=> ($config['allow_mentions'] && $auth->acl_get('u_mention')) ? true : false,
-		'S_MENTION_NAMES_LIMIT'	=> $config['mention_names_limit'],
-		'U_MENTION_URL'			=> $controller_helper->route('phpbb_mention_controller'),
-
 		'T_IMAGES_PATH'			=> "{$phpbb_root_path}images/",
 		'T_SMILIES_PATH'		=> "{$phpbb_root_path}{$config['smilies_path']}/",
 		'T_AVATAR_GALLERY_PATH'	=> "{$phpbb_root_path}{$config['avatar_gallery_path']}/",