function _removeStrings(content) {
        // First remove escaped quotes so we can balance unescaped quotes
        // since JavaScript doesn't support negative lookbehind
        var s = content.replace(/\\\"|\\\'/g, "");

        // Now remove strings
        return s.replace(/\"(.*?)\"|\'(.*?)\'/g, "");
    }
removes strings from the content
@param {!string} content to reduce
@return {string} reduced content