diff --git a/phpBB/includes/acp/acp_styles.php b/phpBB/includes/acp/acp_styles.php
index 2a02e3e845..42c67a88b5 100644
--- a/phpBB/includes/acp/acp_styles.php
+++ b/phpBB/includes/acp/acp_styles.php
@@ -133,32 +133,10 @@ class acp_styles
 				$this->welcome_message('INSTALL_STYLES', 'INSTALL_STYLES_EXPLAIN');
 				$this->show_available();
 				return;
-			case 'cache':
-				$this->action_cache();
-				return;
 		}
 		trigger_error($this->user->lang['NO_MODE'] . adm_back_link($this->u_action), E_USER_WARNING);
 	}
 
-	/**
-	* Purge cache
-	*/
-	protected function action_cache()
-	{
-		global $db, $cache, $auth;
-
-		$this->config->increment('assets_version', 1);
-		$this->cache->purge();
-
-		// Clear permissions
-		$this->auth->acl_clear_prefetch();
-		phpbb_cache_moderators($db, $cache, $auth);
-
-		add_log('admin', 'LOG_PURGE_CACHE');
-
-		trigger_error($this->user->lang['PURGED_CACHE'] . adm_back_link($this->u_base_action), E_USER_NOTICE);
-	}
-
 	/**
 	* Install style(s)
 	*/
diff --git a/phpBB/includes/acp/info/acp_styles.php b/phpBB/includes/acp/info/acp_styles.php
index 1a9865aa1d..c0ab005502 100644
--- a/phpBB/includes/acp/info/acp_styles.php
+++ b/phpBB/includes/acp/info/acp_styles.php
@@ -22,7 +22,6 @@ class acp_styles_info
 			'modes'		=> array(
 				'style'		=> array('title' => 'ACP_STYLES', 'auth' => 'acl_a_styles', 'cat' => array('ACP_STYLE_MANAGEMENT')),
 				'install'	=> array('title' => 'ACP_STYLES_INSTALL', 'auth' => 'acl_a_styles', 'cat' => array('ACP_STYLE_MANAGEMENT')),
-				'cache'		=> array('title' => 'ACP_STYLES_CACHE', 'auth' => 'acl_a_styles', 'cat' => array('ACP_STYLE_MANAGEMENT')),
 			),
 		);
 	}
diff --git a/phpBB/phpbb/db/migration/data/v310/remove_acp_styles_cache.php b/phpBB/phpbb/db/migration/data/v310/remove_acp_styles_cache.php
new file mode 100644
index 0000000000..7b84539814
--- /dev/null
+++ b/phpBB/phpbb/db/migration/data/v310/remove_acp_styles_cache.php
@@ -0,0 +1,51 @@
+<?php
+/**
+*
+* This file is part of the phpBB Forum Software package.
+*
+* @copyright (c) phpBB Limited <https://www.phpbb.com>
+* @license GNU General Public License, version 2 (GPL-2.0)
+*
+* For full copyright and license information, please see
+* the docs/CREDITS.txt file.
+*
+*/
+
+namespace phpbb\db\migration\data\v310;
+
+class remove_acp_styles_cache extends \phpbb\db\migration\migration
+{
+	public function effectively_installed()
+	{
+		$sql = 'SELECT module_id
+			FROM ' . MODULES_TABLE . "
+			WHERE module_class = 'acp'
+				AND module_langname = 'ACP_STYLES_CACHE'";
+		$result = $this->db->sql_query($sql);
+		$module_id = $this->db->sql_fetchfield('module_id');
+		$this->db->sql_freeresult($result);
+
+		return !$module_id;
+	}
+
+	static public function depends_on()
+	{
+		return array('\phpbb\db\migration\data\v310\rc4');
+	}
+
+	public function update_data()
+	{
+		return array(
+			array('module.remove', array(
+				'acp',
+				'ACP_STYLE_MANAGEMENT',
+				array(
+					'module_basename'   => 'acp_styles',
+					'module_langname'   => 'ACP_STYLES_CACHE',
+					'module_mode'       => 'cache',
+					'module_auth'       => 'acl_a_styles',
+				),
+			)),
+		);
+	}
+}