removing tabs implemenation

Author: mansona

addon/styles/addon.css

@@ -11,6 +11,5 @@
 @import "components/es-header.css";
 @import "components/es-page-header.css";
 @import "components/es-button.css";
-@import "components/es-tabs.css";
 @import "components/es-card.css";
 @import "components/es-footer.css";