fix: 移除分享按钮边框

Author: zydemail

packages/pro-components/chat/chat-actionbar/chat-actionbar.less

@@ -67,6 +67,9 @@
     border-right: 2rpx solid @component-stroke;
     background-color: unset;
     outline: none;
+    border: none;
+    border-radius: 0;
+    line-height: inherit;
 
     &:after {
       display: none;