How delete or remove a component of an GameObject?

simply use Destroy() function.

 // Kills the game object
     Destroy (gameObject);
     // Removes this script instance from the game object
     Destroy (this);
     // Removes the rigidbody from the game object
     Destroy (rigidbody);
     
     // Kills the game object in 5 seconds after loading the object
     Destroy (gameObject, 5);
     // When the user presses Ctrl, it will remove the script 
     // named FooScript from the game object
     function Update () {
         if (Input.GetButton ("Fire1") && GetComponent (FooScript))
             Destroy (GetComponent (FooScript));
     }

remove unity gameobject

Destroy(GetComponent(myScript));

If you wrote a script you did not have to say GetComponent twice. Because it's already defined! ;-)

Example:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class ExampleClass : MonoBehaviour 
 {
         public ExampleScript exp;
         
         void Start ()
         {
               exp = GetComponent<ExampleScript>();
         }
 
         void Update ()
         {
                Destroy(exp);
         }
 }
 

Check the link below.The blog teaches the way to create a gameobject,add components,remove componenets and deleting gameobject on runtime.

https://unfragilecoding.blogspot.com/2018/12/creating-gamobject-adding-components.html