`es/minifier`: assignments to exported variables are removed

[Boshen]

Describe the bug

Assignments to live bindings cannot be removed.

Input code

export let foo;
foo = 1;

Link to the code that reproduces this issue

https://play.swc.rs/?version=1.13.1&code=H4sIAAAAAAAAA0utKMgvKlHISS1RSMvPt%2BYCEgq2CobWAHqA2VAYAAAA&config=H4sIAAAAAAAAA32US47bMAyG93OKwOsuikHRRQ%2FQXc8gKBblKJVEQ6QyMQa5e2nZeXRCZ2fz409KJMXPt92uO1Lf%2Fdp9yqf8jLYQlNu%2FWGjKbM9i6aBPlvoSRu6%2BXemRZuRtJGimy0I6tmUAbip6%2F%2F7%2BY1V0EZHgqlhtKeTgp8ecPaaxANGDTawSsibITP%2FrV1bwYwZc6qN9jxjB5hfEWDIhMwxQtMA9xmhHAnOyRYkyn9SWQKilmGFlcGYsOKo8u8ABs%2BR8pg6sMz06UFAo0HM4gSaTXCLLJNdT7tOwg30dhtbnL2o42VgtKznh3Foip1WiHjAQG1%2BzVsIFbtRggWtxvyqDNwW4lvysO2LIGz35CyAViJYo2wRa3ObhZZ621P6lMmQvI8uTwmW%2BtVtmGKSoJgSvVHauDBQOWjcLuNrDXNleO86KN8pHwYEB72VWlND0Ebg%2FaEl5GgG9AqS%2F1mtTtQBze4UbfH4QL%2FBvuSXrA7Z6JMuHbUpT2mN8kSABH9C9cJBWMG7jIlviPG7zmh3IaIBTXSo18LwE5AEwmtj25dNsyPOQiGaIuL%2BvidXhctvDyebh%2Ft6XVfy2OnQJXW1wXfJzf5fV%2FLO7O1238O3gXaA%2FV2VLevkHTP0r1zAGAAA%3D

SWC Info output

No response

Expected behavior

export let foo;
foo = 1;

Actual behavior

export let foo;

Version

1.13.2

Additional context

No response

[swc-bot]

This closed issue has been automatically locked because it had no new activity for a month. If you are running into a similar issue, please create a new issue with the steps to reproduce. Thank you.