can't comment out this part of code in `/node_modules/uglify-js/tools/node.js` to resolve the failure of `Cannot find module '../lib/utils.js'`

[anthhub]

the code of /node_modules/uglify-js/tools/node.js is following:

var fs = require("fs");

exports.FILES = [
    require.resolve("../lib/utils.js"),
    require.resolve("../lib/ast.js"),
    require.resolve("../lib/parse.js"),
    require.resolve("../lib/transform.js"),
    require.resolve("../lib/scope.js"),
    require.resolve("../lib/output.js"),
    require.resolve("../lib/compress.js"),
    require.resolve("../lib/sourcemap.js"),
    require.resolve("../lib/mozilla-ast.js"),
    require.resolve("../lib/propmangle.js"),
    require.resolve("../lib/minify.js"),
    require.resolve("./exports.js"),
];

new Function("exports", function() {
    var code = exports.FILES.map(function(file) {
        return fs.readFileSync(file, "utf8");
    });
    code.push("exports.describe_ast = " + describe_ast.toString());
    return code.join("\n\n");
}())(exports);

function describe_ast() {
    var out = OutputStream({ beautify: true });
    function doitem(ctor) {
        out.print("AST_" + ctor.TYPE);
        var props = ctor.SELF_PROPS.filter(function(prop) {
            return !/^\$/.test(prop);
        });
        if (props.length > 0) {
            out.space();
            out.with_parens(function() {
                props.forEach(function(prop, i) {
                    if (i) out.space();
                    out.print(prop);
                });
            });
        }
        if (ctor.documentation) {
            out.space();
            out.print_string(ctor.documentation);
        }
        if (ctor.SUBCLASSES.length > 0) {
            out.space();
            out.with_block(function() {
                ctor.SUBCLASSES.sort(function(a, b) {
                    return a.TYPE < b.TYPE ? -1 : 1;
                }).forEach(function(ctor, i) {
                    out.indent();
                    doitem(ctor);
                    out.newline();
                });
            });
        }
    };
    doitem(AST_Node);
    return out + "\n";
}

function infer_options(options) {
    var result = exports.minify("", options);
    return result.error && result.error.defs;
}

exports.default_options = function() {
    var defs = infer_options({ 0: 0 });
    Object.keys(defs).forEach(function(component) {
        var options = {};
        options[component] = { 0: 0 };
        if (options = infer_options(options)) {
            defs[component] = options;
        }
    });
    return defs;
};

other than the content descripted in your CONTRIBUTING.md:

var FILES = UglifyJS.FILES = [
    "../lib/utils.js",
    "../lib/ast.js",
    "../lib/parse.js",
    "../lib/transform.js",
    "../lib/scope.js",
    "../lib/output.js",
    "../lib/compress.js",
    "../lib/sourcemap.js",
    "../lib/mozilla-ast.js",
    "../lib/propmangle.js",
    "./exports.js",
].map(function(file){
    return require.resolve(file);
});

new Function("MOZ_SourceMap", "exports", FILES.map(function(file){
    return fs.readFileSync(file, "utf8");
}).join("\n\n"))(
    require("source-map"),
    UglifyJS
);

UglifyJS.AST_Node.warn_function = function(txt) {
    console.error("WARN: %s", txt);
};