_get

function _g() {
    vars = {};
    (window.location.href.split('?').length>1?window.location.href.split('?')[1]:'').split('&').forEach(_ => {
        p=_.split('=');
        vars[`${p[0]}`]=p[1].split(',').length>1?p[1].split(','):p[1];
    });
    return vars;
}

unset (pretty ugly version)

function unset(a,b) {
    g = _g();
    g[b] = (Array.isArray(g)?g:[g])[b].map(_=>{return decodeURIComponent(_);}).filter(x=>x!=a);
    u = Object.keys(g).map(_=>`${_}=${Array.isArray(g[_]?g[_].join(','):g[_])}`).join(',');
    window.location = `${window.location.href.split('?')[0]}?${uri}`;
} // unset('İmex', 'marka')

unset (rather beautiful version)

    function unset(a){
        var getVars = _get();
        getVars['marka'] = getVars.marka.map(_=>{return decodeURIComponent(_)}).filter(marka => marka != a);

        var uri = Object.keys(getVars).map((_) => `${_}=${Array.isArray(getVars[_]) ? getVars[_].join(','):getVars[_]}`).join('&');

        window.location = `${window.location.href.split('?')[0]}?${uri}`;
    }