chore(SideBar): hide scroll bar style

Author: anlyyao

src/side-bar/side-bar.less

@@ -11,6 +11,10 @@
   height: @side-bar-height;
   overflow-y: auto;
 
+  &::-webkit-scrollbar {
+    display: none;
+  }
+
   &__padding {
     flex: 1;
     background-color: @side-bar-bg-color;