--- a/plugins/mod_auth_ldap.lua	Wed Jun 15 11:47:39 2022 +0100
+++ b/plugins/mod_auth_ldap.lua	Wed Jun 15 12:15:01 2022 +0100
@@ -1,6 +1,5 @@
 -- mod_auth_ldap
 
-local jid_split = require "util.jid".split;
 local new_sasl = require "util.sasl".new;
 local lualdap = require "lualdap";
 
@@ -21,6 +20,13 @@
 	module:get_option_string("ldap_admins")); -- COMPAT with mistake in documentation
 local host = ldap_filter_escape(module:get_option_string("realm", module.host));
 
+if ldap_admins then
+	module:log("error", "The 'ldap_admin_filter' option has been deprecated, "..
+	           "and will be ignored. Equivalent functionality may be added in "..
+	           "the future if there is demand."
+	);
+end
+
 -- Initiate connection
 local ld = nil;
 module.unload = function() if ld then pcall(ld, ld.close); end end
@@ -133,22 +139,4 @@
 	module:log("error", "Unsupported ldap_mode %s", tostring(ldap_mode));
 end
 
-if ldap_admins then
-	function provider.is_admin(jid)
-		local username, user_host = jid_split(jid);
-		if user_host ~= module.host then
-			return false;
-		end
-		return ldap_do("search", 2, {
-			base = ldap_base;
-			scope = ldap_scope;
-			sizelimit = 1;
-			filter = ldap_admins:gsub("%$(%a+)", {
-				user = ldap_filter_escape(username);
-				host = host;
-			});
-		});
-	end
-end
-
 module:provides("auth", provider);