Deleting one of 2 pointers that point to the same thing

So i have an array of pointers that point to objects, and a pointer that points to each object elsewhere in my code. What i want is when i delete those other pointer. How do i rearrange my array of pointers so that there's no garbage values in the middle of it. I have a rearrange function that checks for NULL but the pointer doesn't point to NULL. So i have an array of pointers that point to ob