soc/intel/alderlake: remove unnecessary MSR definition

MSR_VR_MISC_CONFIG2 is not used by AlderLake code.

TEST=compilation check

Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com>
Change-Id: I313acf01c534d0d32620a9dedba7cf3b304ed2ed
Reviewed-on: https://review.coreboot.org/c/coreboot/+/65120
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Bora Guvendik <bora.guvendik@intel.com>

src/soc/intel/alderlake/include/soc/msr.h

@@ -7,6 +7,5 @@
 
 #define MSR_BIOS_DONE		0x151
 #define  ENABLE_IA_UNTRUSTED	(1 << 0)
-#define MSR_VR_MISC_CONFIG2	0x636
 
 #endif