isIP 存在冗余代码

[381510688]

Describe the bug
A clear and concise description of what the bug is.

https://github.com/validatorjs/validator.js/blob/master/src/lib/isIP.js#L57

const parts = str.split('.').sort((a, b) => a - b);
return parts[3] <= 255;

请教一下，这两句代码的意义？
上面正则已经严格控制，一定是数字且会小于255

const IPv4SegmentFormat = '(?:[0-9]|[1-9][0-9]|1[0-9][0-9]|2[0-4][0-9]|25[0-5])';
const IPv4AddressFormat = `(${IPv4SegmentFormat}[.]){3}${IPv4SegmentFormat}`;
const IPv4AddressRegExp = new RegExp(`^${IPv4AddressFormat}$`);

Examples
If applicable, add screenshots to help explain your problem.

Additional context
Validator.js version:
Node.js version:
OS platform: [windows, linux, macOS, etc]

[UnKnoWn-Consortium]

Indeed the two statements are redundant.

From git blame, they appears to be leftover from before the regular expression rewrite that occurred 13 months ago. I have created a pull request #1969 to rectify it.

If you like you can create yours and I will retract mine.