var myObject = {
    foo: 'foo',
    bar: 'bar',
    //baz: 'baz'
};

##</code><code>##

s#^((?:[^/\n]|/(?!/))*),((?:\s*|//.*$|/\*(?:[^*]|\*(?!/))*\*/)*\s*[}\]])#$1$2#mg