[IA64] Remove stale comment from ia64/Kconfig

Somehow I doubt this comment is meant to be here anymore... It's
been floating after the L1_CACHE_SHIFT entry since before Linux
moved to bitkeeper.

Signed-off-by: Kyle McMartin <[e-mail]>
Signed-off-by: Tony Luck <[e-mail]>

arch/ia64/Kconfig

···
 	default "7" if MCKINLEY
 	default "6" if ITANIUM
 
-# align cache-sensitive data to 64 bytes
 config IA64_CYCLONE
 	bool "Cyclone (EXA) Time Source support"
 	help