node:util polyfill should remove the is* methods

[jasnell]

The various util.is* methods have reached End-of-Life in Node.js and were removed. They should be removed from the polyfill. The only one currently remaining is isArray(...)

https://nodejs.org/docs/latest/api/deprecations.html#dep0045-utilisboolean

https://github.com/cloudflare/workers-sdk/blob/main/packages/unenv-preset/src/runtime/node/util.ts#L31C2-L44

Might need to be handled as a major change.

/cc @petebacondarwin @vicb

[Cherry]

This was briefly discussed in #7942 (comment) and I think definitely needs a major.

I wish the nodejs compat was versioned to avoid this though.

[petebacondarwin]

We are going to move all the EOL methods into workerd behind a compat flag that can be turned off with a compat date.
This avoids the need for a breaking change release of wrangler etc.

See cloudflare/workerd#4706

[Cherry]

Awesome! Question: what happens when Node.js v30 or some future versions deprecates/removes other things? Will we see remove_nodejs_compat_eol_v30_methods (etc.) flags?

EDIT: nevermind, just saw this in the workerd PR:

  # This flag is intended to be a roll-up flag. That is, as additional APIs
  # reach EOL, new compat flags will be added for those that will have
  # `impliedByAfterDate(name = "removeNodeJsCompatEOL", ...` annotations.

[vicb]

There are now dedicated EOL flags to remove EOL functions, see https://github.com/cloudflare/workerd/blob/182098fbaa2df43c2ae0299affa9ce68fe007b89/src/workerd/io/compatibility-date.capnp#L934