[core] Remove stylis prefixer

[aarongarciah]

Part of #44921 (comment)

Context

Emotion keeps a local copy of the stylis prefixer to only apply the prefixes they consider necessary. Emotion will likely remove all of the prefixes in v12, but that might take some time to land. See related PR emotion-js/emotion#3296

We tell users to use the stylis prefixer in our docs. Although most of the CSS properties shouldn't be prefixed anymore using the stylis prefixer because they're widely available, there are a few properties that still require a prefix (see comments in this Emotion PR, which keeps their own local copy of the stylis prefixer:

• color-adjust
• box-decoration-break
• mask, mask-image, mask-(mode|clip|size), mask-(repeat|origin), mask-position, mask-composite
• user-select, hyphens, text-size-adjust

It's not safe to remove the stylis prefixer just yet, because of this. The ideal path forward would be for stylis to be less defensive and remove widely supported prefixes in a new version, but it's not clear which are the browsers that stylis wants to support.

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[DiegoAndai]

Thanks for reviewing this so quickly @aarongarciah.

• Our components have the prefixes present. Do these come from Emotion or our configuration?
• From what I see, we tell users to add the prefixed everytime they need to setup an Emotion cache. But for that, we're using Emotion's createCache. Doesn't Emotion add the prefixes on their side?

[siriwatknp]

• Our components have the prefixes present. Do these come from Emotion or our configuration?

Do you mean the components in the docs or in isolation environment like in CodeSandbox?

Doesn't Emotion add the prefixes on their side?

Only if the options.stylisPlugin is not provided, see https://github.com/emotion-js/emotion/blob/next/packages/cache/src/index.ts#L89

[aarongarciah]

Closing this since we can't stop passing prefixed to the stylisPlugins option from createCache because some CSS properties still need to be prefixed even in modern browsers (e.g. user-select in Safari 18.3). Emotion uses its own prefixer (a more minimalistic version of the stylis one), but only when no stylisPlugins option is present. See https://github.com/emotion-js/emotion/blob/8dc1a6dd19d2dc9ce435ef0aff85ccf5647f5d2e/packages/cache/src/index.ts#L89