Here's the code to point the head to the next node of the head in the `remove_at_beginning()` method:
```
class LinkedList:
def __init__(self):
self.head = None
self.tail = None
def remove_at_beginning(self):
# The "next" node of the head becomes the new head node
if self.head:
self.head = self.head.next
```
Note that we check whether there is a head node before updating it. If there is no head node, then there is nothing to remove.