Sample User Preference file for CSSLint plugin (showing ignore) https://github.com/austinhappel/sublime-csslint

user-preference.json

{

    // CSSLint rules you wish to define as errors. Must be an array. Leave blank to include all default rules.
    "errors": [],

    // CSSLint rules you wish to define as warnings. Must be an array. Leave blank to include all default rules.
    "warnings": [],

    // CSSLint rules you wish to ignore. Must be an array. Leave blank to include all default rules.
    "ignore": ["floats","universal-selector","box-model","unqualified-attributes"]
}