[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: NKyle McMartin <kyle@parisc-linux.org>
Signed-off-by: NTony Luck <tony.luck@intel.com>

arch/ia64/Kconfig

@@ -194,7 +194,6 @@ config IA64_L1_CACHE_SHIFT
 	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