I verified this in trusty by install the version of apt from -proposed, then installing kernel version 3.13.0-48 and then running apt-get autoremove and received the following message:
bdmurray@bizarro:~/bin$ sudo apt-get autoremove
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
linux-headers-3.13.0-46 linux-headers-3.13.0-46-generic
linux-image-3.13.0-46-generic linux-image-extra-3.13.0-46-generic
0 upgraded, 0 newly installed, 4 to remove and 0 not upgraded.
After this operation, 271 MB disk space will be freed.
Do you want to continue? [Y/n] n
I verified this in trusty by install the version of apt from -proposed, then installing kernel version 3.13.0-48 and then running apt-get autoremove and received the following message:
bdmurray@ bizarro: ~/bin$ sudo apt-get autoremove headers- 3.13.0- 46 linux-headers- 3.13.0- 46-generic image-3. 13.0-46- generic linux-image- extra-3. 13.0-46- generic
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages will be REMOVED:
linux-
linux-
0 upgraded, 0 newly installed, 4 to remove and 0 not upgraded.
After this operation, 271 MB disk space will be freed.
Do you want to continue? [Y/n] n