i want to extend from one class but delete some property

I have some class for crud API service class I want to extend it but spear few properties for exam this is my class

class Parent {
public propertyToKeep: any;
public propertyToDelete: any;
constructor() { }
}


this is the child class

class Child extends Parent {
constructor() {
super();
}
}


Another file where I don't want to see and get access to

export class comeComponent {
constructor(private child: Child) {
this.child.propertyToKeep // work
this.child.propertyToDelete // error and I can't even see it
}
}

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