Fix UnboundLocalError for 'time' variable in WiFi scanning

- Removed local import of 'time' module in scan_wifi_networks method
- The 'time' module is already imported at the top of the file
- Local import was creating a variable that shadowed the imported module
- This caused UnboundLocalError when trying to access time.sleep(2)
- WiFi scanning should now work without variable scoping errors

This resolves the 'cannot access local variable time where is not associated with a value' error
that occurred during WiFi network scanning in the AutoInstaller GUI.

autoinstaller_gui/autoinstallergui.py

@@ -348,7 +348,6 @@ class NetworkInterfaceDialog(QDialog):
             # Enable interface for scanning
             subprocess.run(['ip', 'link', 'set', self.selected_interface, 'up'], check=True)
             # Wait a moment
-            import time
             time.sleep(2)
             # Scan
             result = subprocess.run(['iw', 'dev', self.selected_interface, 'scan'],