Remove useless linksForCordova filter

We deprecated the cordova app long ago

js/filters.js

@@ -146,17 +146,6 @@ weechat.filter('DOMfilter', ['$filter', '$sce', function($filter, $sce) {
     };
 }]);
 
-// This is used by the cordova app to change link targets to "window.open(<url>, '_system')"
-// so that they're opened in a browser window and don't navigate away from Glowing Bear
-weechat.filter('linksForCordova', ['$sce', function($sce) {
-    return function(text) {
-        // XXX TODO this needs to be improved
-        text = text.replace(/<a (rel="[a-z ]+"\s+)?(?:target="_[a-z]+"\s+)?href="([^"]+)"/gi,
-                            "<a $1 onClick=\"window.open('$2', '_system')\"");
-        return $sce.trustAsHtml(text);
-    };
-}]);
-
 weechat.filter('getBufferQuickKeys', function () {
     return function (obj, $scope) {
         if (!$scope) { return obj; }