Removed Beta from CSS

public/less/_base.less

@@ -557,12 +557,6 @@ footer {
 			color: #dddddd !important;
 		}
 	}
-	&.beta {
-		padding: 0px !important;
-		font-size: @15;
-		color: @white !important;
-		font-weight: bold !important;
-	}
 	&.caret {
 		font-size: 11px;
 	}