Lots of options/OS versions in Grub - needed?

[HughJarse]

After regular updates there is now a large number of options when Grub comes up. (Grub 1.98)
I have two HDDs one with many versions of 10.04

System.map-2.6.32-21-generic
System.map-2.6.32-22-generic
System.map-2.6.32-23-generic
System.map-2.6.32-24-generic
System.map-2.6.32-25-generic
System.map-2.6.32-26-generic
System.map-2.6.32-27-generic
System.map-2.6.32-28-generic
System.map-2.6.32-29-generic
System.map-2.6.32-30-generic
System.map-2.6.32-31-generic
System.map-2.6.32-32-generic
System.map-2.6.32-33-generic
System.map-2.6.32-34-generic
System.map-2.6.32-35-generic
System.map-2.6.32-36-generic
System.map-2.6.32-37-generic
System.map-2.6.32-38-generic
System.map-2.6.32-41-generic
System.map-2.6.32-42-generic
System.map-2.6.32-43-generic
System.map-2.6.32-44-generic
System.map-2.6.32-45-generic

There is a similar list underneath for 12.04 LTS.
Question is can I removed these old files from the boot folder as I will always select the latest version anyway.