Refactor carousel style (#25906)

* refactor: Carousel style for fix vertical-align

* fix: remove slide border

components/carousel/style/index.less

@@ -51,10 +51,8 @@
       // fix Carousel content height not match parent node
       // when children is empty node
       // https://github.com/ant-design/ant-design/issues/25878
-      > div > div > *:empty::after {
-        visibility: hidden;
-        content: 'none';
-        pointer-events: none;
+      > div > div {
+        vertical-align: bottom;
       }
     }
   }
@@ -112,7 +110,6 @@
   .slick-vertical .slick-slide {
     display: block;
     height: auto;
-    border: @border-width-base @border-style-base transparent;
   }
   .slick-arrow.slick-hidden {
     display: none;