fix!: avoid rewriting this (reverts #5312)

[patak-dev]

Fixes #12340

Description

This PR reverts #5312. As it was discussed in #12340, Vite shouldn't be replacing this in an ESM context.

@ArnaudBarre, #5312 was intended to avoid THIS_IS_UNDEFINED warnings in React apps, but we're already ignoring this warning here:

vite/packages/vite/src/node/build.ts

Line 876 in 63a4451

const warningIgnoreList = [`CIRCULAR_DEPENDENCY`, `THIS_IS_UNDEFINED`]

If there is a warning or error in source maps to be avoided though, we should fix it without the need for this rewrite.

As proposed by @bluwy, we can merge this in Vite 5 as it is a breaking change.

---

What is the purpose of this pull request?

• Bug fix
• New Feature
• Documentation update
• Other

[bolt-new-by-stackblitz]

Run & review this pull request in StackBlitz Codeflow.

[patak-dev]

/ecosystem-ci run

[vite-ecosystem-ci]

📝 Ran ecosystem CI: Open

suite	result
analogjs	✅ success
astro	✅ success
histoire	❌ failure
ladle	✅ success
laravel	❌ failure
marko	❌ failure
nuxt	❌ failure
nx	✅ success
previewjs	✅ success
qwik	✅ success
rakkas	✅ success
sveltekit	❌ failure
unocss	❌ failure
vite-plugin-pwa	✅ success
vite-plugin-ssr	❌ failure
vite-plugin-react	✅ success
vite-plugin-react-pages	❌ failure
vite-plugin-react-swc	❌ failure
vite-plugin-svelte	❌ failure
vite-plugin-vue	✅ success
vite-setup-catalogue	✅ success
vitepress	❌ failure
vitest	✅ success

[patak-dev]

Same failures as in main, it will take some time to get everyone green again. We can merge this one