Fix issue where horizontal scrollbar always displayed on tabs

Author: nathan-contino

jekyll-assets/css/asciidoctor-tabs.css

@@ -6,8 +6,6 @@
 .tablist > ul {
   display: flex;
   flex-wrap: nowrap;
-  overflow-x: scroll;
-  overflow-y: hidden;
   list-style: none;
   margin: 0;
   padding: 0;