What information was incorrect, unhelpful, or incomplete?

many CSS function data are repetitive represented the functions.json file and syntaxes.json file, this may cause inconsistent and hard to maintain

for example:

and

What did you expect to see?

only keep CSS function data in functions.json

Do you have any supporting links, references, or citations?

No response

Do you have anything more you want to share?

note the change may cause break change though

maybe should listen to other's opinions