Packages are NOT removed, only cached information (and therefore cached copies of installed applications).
Since the installed base isn’t likely to change - I would encourage you to “apt-get clean all” to remove the crap.
IF you want to remove installed but un-used applications, that should be “apt-get autoremove --purge”
However your system is already clean;
pi@emonpi(rw):~$ sudo apt-get autoremove --purge
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Another nice addition - you might notice my prompt that tells me when the filesystem is “ro” or “rw” - add the following code to the end of /etc/bash.bashrc
set_bash_prompt(){
fs_mode=$(mount | sed -n -e "s/^\/dev\/mmcblk0p2 on \/ .*(\(r[w|o]\).*/\1/p")
if [ $(id -u) -eq 0 ];
then
PS1='\[\033[01;31m\]\u@\h${fs_mode:+($fs_mode)}\[\033[00m\]:\[\033[01;34m\]\W\[\033[00m\]\$ '
else
PS1='\[\033[01;32m\]\u@\h${fs_mode:+($fs_mode)}\[\033[00m\]:\[\033[01;34m\]\W\[\033[00m\]\$ '
fi
}
# setup fancy prompt
PROMPT_COMMAND=set_bash_prompt
This also turns the whole prompt RED if you are root
Hope those help.