Once a node is removed ensure that it's prev and next points to none to ensure that it's fully isolated/disconnected

Author: HassanOHOsman

Sprint-2/implement_linked_list/linked_list.py

@@ -50,6 +50,9 @@ def remove(self, node):
         else:
             self.tail = node.previous
 
+        node.previous = None
+        node.next = None
+