How to prevent debugging code to be compiled for prod

Ionic Framework ionic-v3
#1

I have some parts of my app that need user interaction, since I do not want to make this interaction every time I am coding a new feature in that path I have this snippet:

if (this.isDevMode) {
    alert.addInput({
        type: 'radio',
        label: 'this should not be in production',
        value: 'this should not be in production',
        checked: false,
        disabled: !this.isDevMode
    });
}

The thing is even when I do not see that option when I build the app with --prod I do see that code minified:

this.isDevMode && e.addInput({
    type: "radio",
    label: "this should not be in production",
    value: "this should not be in production",
    checked: !1,
    disabled: !this.isDevMode
}),

Is there a way to three shake this in a prod environment ?

#2