Share markdown angular filter via client.js

src/js/index.js

@@ -386,24 +386,6 @@ app.filter('prettyEmailAddresses', function () {
     };
 });
 
-app.filter('markdown2html', function () {
-    var converter = new showdown.Converter({
-        extensions: [ 'targetblank' ],
-        simplifiedAutoLink: true,
-        strikethrough: true,
-        tables: true
-    });
-
-    // without this cache, the code runs into some infinite loop (https://github.com/angular/angular.js/issues/3980)
-    var cache = {};
-
-    return function (text) {
-        if (cache[text]) return cache[text];
-        cache[text] = converter.makeHtml(text);
-        return cache[text];
-    };
-});
-
 app.filter('postInstallMessage', function () {
     var SSO_MARKER = '=== sso ===';