fix: fix fvm check

[charles0122]

#312

If fvm is already included in the project, can we consider removing the code that checks for fvm

[charles0122]

I have a question, if I have a version of fvm at the beginning, and then I start using sidekick, will there be a conflict, or will sidekick detect that I already have a version and not ask me to set the environment variable?

[charles0122]

Another thing is that the fvm version in sidekick is not easy to update. Is it possible to update fvm through shell without built-in fvm?

[charles0122]

#311

[aguilaair]

Yep, we can remove the FVM checking code istself

[charles0122]

I was in the process of removing code and saw that Chocolatey and Brew were only used to download fvm, so I thought I'd check their code and remove it as well. If they have other uses, please let me know.

[charles0122]

@aguilaair

[charles0122]

They can be used to download git, but the download description says to download fvm

[aguilaair]

Let's keep brew/choco for now, we should update the description though

[charles0122]

@aguilaair We can close the related issue.