Boot Partition nearly full

Problem Description
The boot Partition (270mb) is nearly full (250mb). I don’t know why. I tried looking around the forum but didn’t find a solution yet. The Raspi firmware is installed and sudo apt autoremove says, there is nothing to remove.

Information
*Freedombox Version 25.6

  • Raspberry Pi 4
    *I used the raspberry pi imager to install Freedombox

I think you will need to manually clean up some files that are associated with an older version of the Linux kernel (than the one that is currently running). To find out the current Linux kernel version, you can run:

uname -r

Sorry that I don’t have more specific directions at this time. I understand that there is supposed to be a mechanism to perform this cleanup automatically, but it seems to not be working correctly.