remove duplicates from sorted linked list

duplicates.cpp

Node* removeDuplicates(Node *head) {
    if(head == nullptr) return head;
    while(head->next != nullptr && head->data == head->next->data) {
        auto dup = head->next;
        head->next = dup->next;
        delete dup;
    }
    removeDuplicates(head->next);
    return head;
}