This might need some background...

Let's be clear, John Bolton is an asshole:

https://www.politico.com/story/2018/09/23/john-bolton-united-nations-iran-836454

That being said, he did work for Trump and accumulated some enemies doing so.

Trump initially pulled his secret service protection back in 2019, which President Biden restored:

https://www.newsweek.com/donald-trump-cancelled-john-bolton-security-iran-election-2024-1967277

This seems to be yet another act of petty retribution against someone who spoke poorly of Trump.