Revert breaking changes related to adding pure css parser for minor releasing (#9500)
* revert without tests
* Downgrade postcss-scss and postcss-less
* Fix tests
* Revert "Make `isSCSS*` function stricter (#9093)"
This reverts commit 01f986bea959927375e1d551844ca7f50ec6fcff.
* Revert "Remove `css` parser from `isLessParser` check (#9092)"
This reverts commit c0bca1805de45d5f1aab9628cf45af64e4ef00fc.
* Revert "Add pure css parser (#7933)"
This reverts commit 589ebf670b8db4b21661fb551ff0b4822f8b63d6.
* Disable `parser-postcss.js` minify
* Try to fix build script
* Update fs.mjs
* Update fs.mjs
* Style
Co-authored-by: fisker <lionkay@gmail.com>