删除modal里滚动条问题

Author: hanwu

src/components/modal/index.less

@@ -139,8 +139,6 @@
     box-sizing: border-box;
     font-size: @font-size-base;
 
-    scrollbar-width: thin;
-    scrollbar-color: @scrollbar-thumb @scrollbar-bg;
 
     &::-webkit-scrollbar {
       width: 8px;