对话框禁用动画后无法关闭

[concefly]

• I have searched the issues of this repository and believe that this is not a duplicate.

Reproduction link

Steps to reproduce

1. 打开对话框
2. 点击对话框上的“关闭”按钮

What is expected?

对话框关闭

What is actually happening?

对话框没有消失

Environment	Info
antd	4.7.0
React	16.14.0
System	mac
Browser	chrome Version 86.0.4240.75 (Official Build) (x86_64)

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应该和这个改动有关 #26940

[zombieJ]

空字符串会禁止动画：https://codesandbox.io/s/exciting-kapitsa-hmfq1

我看看怎么兼容这种写法。

[zombieJ]

讨论了一下，不用兼容。文档里写一下怎么关闭动画。