How to disable TypeScript Object.defineProperty(exports, "__esModule", { value: true })?

The ts compiler emit this line in every file:

Object.defineProperty(exports, "__esModule", { value: true });

But my code is running on Nodejs, I am not writing a libaray so I think this line is unnecessary for me. How can I disable it? My compiler option is:

{
    "compilerOptions": {
        "target": "es6",
        "module": "commonjs",
        "allowJs": true,
        "sourceMap": true,
        "outDir": "build",
        "moduleResolution": "Node",
        "lib": ["es6"]
    }
}

For example, compile this ts file:

function add(a: number, b: number): number {
    return a + b
}

export { add }

I got:

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
function add(a, b) {
    return a + b;
}
exports.add = add;
//# sourceMappingURL=App.js.map

How can I remove the second line?