remove some XXX notes that have been addressed

www/common/common-ui-elements.js

@@ -1364,7 +1364,6 @@ define([
             case 'import':
                 button = $('<button>', {
                     'class': 'fa fa-upload cp-toolbar-icon-import',
-                    // XXX text is weird anywhere other than the drive
                     title: Messages.importButtonTitle,
                 }).append($('<span>', {'class': 'cp-toolbar-drawer-element'}).text(Messages.importButton));
                 /*if (data.types) {

www/common/outer/mailbox-handlers.js

@@ -515,7 +515,7 @@ define([
         cb();
     };
 
-    handlers["SAFE_LINKS_DEFAULT"] = function (ctx, box, data, cb) { // XXX
+    handlers["SAFE_LINKS_DEFAULT"] = function (ctx, box, data, cb) {
         var curve = ctx.store.proxy.curvePublic;
         if (data.msg.author !== curve) { return void cb(true); }
         cb();