How to remove vendor prefixes Emmet (ST3)?

Question

Emmet

I'm struggling with emmet, it adds prefixes that I don't need, because post-processing SASS they are added automatically, and these prefixes are annoying and impair readability.
The question is how to remove them?
The default settings say nothing about this.

Answer 1

in emmet settings

{
    "preferences": {
        "css.autoInsertVendorPrefixes": false
    }
}

Answer 2

This helped me in Emmet's User settings in ST3:
{
"preferences": {
"css.autoInsertVendorPrefixes": false,
"caniuse.enabled": false,
"caniuse.vendors": false
}
}
Here is an article from github, where about it is written.