You can edit the registry to do that. I used to get a lot of requests to remove the "branding" from computers. (For example, stuff like the Internet Explorer Powered By Dell nonsense you see on a lot of consumer computers.) Unless someone has written some very obscure tweak, you'd have to do it item-by-item.
I wouldn't recommend it, though. Unforeseen consequences can be a pain.
My Computer
Computer Manufacturer/Model Number
Self
OS
Main - Windows 7 Pro SP1 64-Bit; 2nd - Windows Server 2008 R2
CPU
Main - Core i7 2600K; 2nd - Core i7 920
Motherboard
Main - Asus P8Z68-V Pro/Gen3; 2nd - Gigabyte GA-EX58-UDR3
Memory
Main - 16GB Corsair Vengeance; 2nd - 12GB Corsair Vengeance