Remove light-dark() polyfill once we have support

[mkrause]

See:

baklava/vite.config.ts

Line 71 in 4378054

// Use minimum targets so that the `light-dark()` polyfill doesn't get applied, which is buggy.

Currently we're relying on the lightningcss polyfill for light-dark(), but it's a bit buggy (doesn't work well with nested color-scheme, and also sometimes doesn't get properly transpiled for some reason, at least in our current build setup).

However, we can't move away at the moment because light-dark() is still relatively new (baseline since 2024-05-13), and in particular Chromatic runs Chrome 121 which doesn't support it. It is expected that Chromatic will upgrade to a newer browser version early 2025, so by that time we should re-evaluate whether we really need this polyfill anymore.