fix: remove delete statement on render for react 18

[yykoypj]

解决的问题：

在React18中，在render里面操作delete容易导致意外的情况

问题描述：

在给antd迁移upload的测试库到testing-lib的时候 发现下面的用例修改完语法之后在React18中一直无法通过测试 https://github.com/ant-design/ant-design/blob/master/components/upload/tests/uploadlist.test.js#L112-L152 uid为0的记录在删除时一直处在animate-leave-active的状态 调试过程中发现为CSSMotionList在调用CSSMotion组件时传入的onVisibleChange偶尔会变成undifined导致的问题 https://github.com/react-component/motion/blob/59dc90cd3645f9dfa95d4e7df68a5f06f3884e85/src/CSSMotionList.tsx#L143-L159 在测试用例中打印下图中的props.onVisibleChange会发现在某一时间点之后成了undefined，导致节点删不掉 https://github.com/react-component/motion/blob/59dc90cd3645f9dfa95d4e7df68a5f06f3884e85/src/CSSMotion.tsx#L154-L159

解决方法：

将CSSMotionList.tsx里render中的delete操作替换为不修改原对象的取值操作，测试即可通过

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Name	Status	Preview	Updated
motion	✅ Ready (Inspect)	Visit Preview	Jun 14, 2022 at 8:26AM (UTC)

[codecov[bot]]

Codecov Report

Merging #31 (0cf9987) into master (59dc90c) will increase coverage by 0.01%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master      #31      +/-   ##
==========================================
+ Coverage   98.33%   98.34%   +0.01%     
==========================================
  Files          11       12       +1     
  Lines         360      363       +3     
  Branches       98       98              
==========================================
+ Hits          354      357       +3     
  Misses          6        6              

Impacted Files	Coverage Δ
src/CSSMotionList.tsx	100.00% <100.00%> (ø)
src/util/pick.ts	100.00% <100.00%> (ø)

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[afc163]

@zombieJ 看看？

[afc163]

@zombieJ