scroll bar shows at any time

[initialdmg]

Version

2.12.0

Environment

windows 7 , chrome 50

Reproduction link

https://ant.design/components/table-cn/#components-table-demo-fixed-header

Steps to reproduce

use fixed header table

What is expected?

donot show the gray arrows and scroll bar

What is actually happening?

scroll-y shows as long as using fixed header

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workaroud i used https://github.com/initialdmg/ant-design/commit/d3beb3eaee4eecd72db16f60ebbf508123fd17db

[afc163]

See #4637

试过四种方式解决头部多余的 scrollbar，但是都会影响列的对齐或导致其他样式问题。

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Tried four ways ot fix the extra scrollbar style of table header, but all would breaks column align or cause other strange issues.

[initialdmg]

谢谢

[mfaradzh]

You also want when changing styles of overflow to hidden to changes margin. This resolves issue of the table hiding part of the table.
.ant-table-fixed-header .ant-table-scroll .ant-table-header{ overflow: hidden !important; margin-bottom: 0px !important; }