Hello,

Since "Direct booting from floppy is no longer supported", this patch is
to remove the bootsect_helper code. And also a comment fix.

Wish my patch is in correct format this time. The other two platforms 
x86_64 and PC-9800 should also be cleaned up too.


-- 
Coywolf Qi Hunt
Admin of http://GreatCN.org and http://LoveCN.org