Basic Delete_At_Front operation implementation on linked list

Which among these two code will be more preferred for deletion of head node of a linked list and why? what is the use of allocating memory to temp , if we want to delete it ,eventually?

code-1:

void Delete_at_Front() {
     if (head == NULL) return;
       else {
         Node *temp = head;
         head = head -> next;
         delete temp;}
    }

code -2 :

 void Delete_at_Front() {
    if (head == NULL) return;
    else {
        head = head -> next; }
    }