Removed from the official image:

• systemd
• tzdata
• bash (change #!/bin/bash to #!/bin/sh for dash)
• iproute
• various low-level system tools and libraries
• doc (copyright files archived in /usr/share/copyrights.tar.gz)
• man
• info

Utility scripts provided:

• /opt/post-apt cleans apt caches, logs, and installed docs
• /opt/dev installs bash and ncurses-base for an interactive shell