fix: remove unused itertools import and redundant GuacSession re-import

Addresses ruff F401 (evtx.py) and F811 (database.py) flagged in PR review.

Author: wmetcalf

analyzer/windows/modules/auxiliary/evtx.py

@@ -1,4 +1,3 @@
-import itertools
 import logging
 import os
 import subprocess

lib/cuckoo/core/database.py

@@ -226,7 +226,6 @@ def drop(self):
 
     def create_guac_session(self, token, task_id, vm_label, guest_ip):
         """Create a new guac session for a task."""
-        from lib.cuckoo.core.data.guac_session import GuacSession
         session = self.session()
         try:
             guac = GuacSession(token=str(token), task_id=task_id, vm_label=vm_label, guest_ip=guest_ip)