Remove HingeJoint2D from the Instance not from the Prefab

Iam trying to remove the HingeJoint 2D from the instance. But after I do that, all the objects instantiated from the prefab have no HingeJoint2D !! The problem is it removes the HingeJoint2D from the prefab rather than the instance. Here's the code:

 Destroy(gameObject.GetComponent("HingeJoint2D"));
 // Above code is attached to the object which has HingeJoint2D
 
 //Problem is after the component is removed, all the objects instantiated
 //do not have HingeJoint2D !!
 
 //My Goal is to remove HingeJoint2D from the instance not the prefab !!

Any help is appreciated !!