Remove cmake from build requirements

[jeffcharles]

Description of the change

Removing cmake from the list of things that need to be installed to build Javy.

Why am I making this change?

cmake does not appear to be necessary. Or at least I was able to build Javy on a fresh Ubuntu 24.04 without it.

Checklist

• I've updated the relevant CHANGELOG files if necessary. Changes to javy-cli and javy-plugin do not require updating CHANGELOG files.
• I've updated the relevant crate versions if necessary. Versioning policy for library crates
• I've updated documentation including crate documentation if necessary.

[saulecabrera]

Do you remember what introduced the need for cmake? I'm just wondering if the root cause is known and we can confidently remove this dependency from the docs. If we're no confident about the root cause, perhaps we can consider keeping this around? Going back in history, it seems that binaryen-rs is what introduced the cmake dependency, we have now migrated to wasm-opt-rs, so I think we should be good.

[jeffcharles]

It looks like it was binaryen-rs to me as well. FWIW, a fresh docker image of Ubuntu 24.04 does not have cmake installed and Javy will build on it without any errors. I'm skeptical that there would be some dependency that would require cmake but only on MacOS.