Removing old kernels doesn't clean up

I noticed that the removal of old kernels does not uninstall the kernel headers for that kernel, nor does it delete the folder in /lib/modules

Linux-headers are at about 130Mb i memory serves, this could cause a lot of bloat if a lot of kernels have been installed (through regular updates). Even if the kernel is removed to save space, the headers still remain. Is this intentional?

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-generic-pae 3.2.0.24.26
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic-pae 3.2.14
Uname: Linux 3.2.0-24-generic-pae i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu7
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: andy 2313 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xefebc000 irq 45'
   Mixer name : 'SigmaTel STAC9200'
   Components : 'HDA:83847690,102801d6,00102201 HDA:14f12bfa,14f100c3,00090000'
   Controls : 14
   Simple ctrls : 7
Date: Tue May 8 13:12:32 2012
HibernationDevice: RESUME=UUID=95e17f36-156e-42a0-a81a-3f1d883e4b62
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20120203)
MachineType: Dell Inc. Latitude D420
PccardctlIdent:
 Socket 0:
   no product info available
PccardctlStatus:
 Socket 0:
   no card
ProcEnviron:
 LANGUAGE=en_GB:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-24-generic-pae root=UUID=3cd487d1-a1c9-48fd-9c86-b388897bc6ef ro quiet splash ipv6.disable=1 vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.2.0-24-generic-pae N/A
 linux-backports-modules-3.2.0-24-generic-pae N/A
 linux-firmware 1.79
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 02/02/2008
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A06
dmi.board.name: 0YJ387
dmi.board.vendor: Dell Inc.
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.modalias: dmi:bvnDellInc.:bvrA06:bd02/02/2008:svnDellInc.:pnLatitudeD420:pvr:rvnDellInc.:rn0YJ387:rvr:cvnDellInc.:ct8:cvr:
dmi.product.name: Latitude D420
dmi.sys.vendor: Dell Inc.