apt itself update and download packages

I have Debian SID with the following APT configuration:

APT::Periodic::Update-Package-Lists "0";
APT::Periodic::Download-Upgradeable-Packages "0";
APT::Periodic::AutocleanInterval "0";
APT::Periodic::Unattended-Upgrade "0";

I remove apt and aptitude scripts from /etc/cron.daily.

But apt itself do update and download operation, and When i use apt-get dist-upgrade i prevent to :

Need to get 0 B/24.0 MB of archives.

It means apt itself updates and downloads upgradble packages.

Question is: How can i disable this feature?