found a duplicate language string

public/language/en_GB/users.json

@@ -5,6 +5,5 @@
 	"search": "Search",
 	"enter_username": "Enter a username to search",
 	"load_more": "Load More",
-	"user-not-found": "User not found!",
 	"users-found-search-took": "%1 user(s) found! Search took %2 ms."
 }

public/src/forum/users.js

@@ -134,7 +134,7 @@ define('forum/users', function() {
 						translator.translate(html, function(translated) {
 							$('#users-container').html(translated);
 							if (!data.users.length) {
-								translator.translate('[[users:user-not-found]]', function(translated) {
+								translator.translate('[[error:no-user]]', function(translated) {
 									notify.html(translated);
 									notify.parent().addClass('btn-warning label-warning');
 								});