Remove `__filename` and `__dirname` check from packages/plugin-react-swc/src/index.ts

[hi-ogawa]

vite-plugin-react/packages/plugin-react-swc/src/index.ts

Lines 24 to 32 in a2d76d9

	/* eslint-disable no-restricted-globals */
	const _dirname =
	typeof __dirname !== 'undefined'
	? __dirname
	: dirname(fileURLToPath(import.meta.url))
	const resolve = createRequire(
	typeof __filename !== 'undefined' ? __filename : import.meta.url,
	).resolve
	/* eslint-enable no-restricted-globals */

@AriPerkkio reported this check is broken when running vite through --eval based script. Probably this was only meant for esm/cjs support, but the package is now esm only, so we can probably remove this.