Enable Mode Commands : System Administration Commands : image delete-all
  
image delete-all
Deletes all software image files on the disk.
Syntax
image delete-all
Parameters
None
Example
amnesiac # image delete-all
Product
SCC, Interceptor, SteelHead CX, SteelHead EX, SteelHead-v, Mobile Controller
Related Commands
show images, show bootvar, show info, show version