style(noticebar) : 默认样式调整 (#641)

Co-authored-by: yangxiaolu3 <yangxiaolu3@jd.com>

src/packages/__VUE/noticebar/index.scss

@@ -105,6 +105,8 @@
     overflow: hidden;
 
     .horseLamp_list {
+      margin: 0;
+      padding: 0;
       display: block;
       flex: 1;
       .horseLamp_list_item {