iommu/amd: Remove unused DTE_GCR3_INDEX_* macros

It was added in commit 52815b75 ("iommu/amd: Add support for
IOMMUv2 domain mode"), but never used it. Hence remove these unused
macros.
Signed-off-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Link: https://lore.kernel.org/r/20240828111029.5429-4-vasant.hegde@amd.comSigned-off-by: Joerg Roedel <jroedel@suse.de>

drivers/iommu/amd/amd_iommu_types.h

@@ -415,10 +415,6 @@
 #define DTE_GCR3_VAL_B(x)	(((x) >> 15) & 0x0ffffULL)
 #define DTE_GCR3_VAL_C(x)	(((x) >> 31) & 0x1fffffULL)
 
-#define DTE_GCR3_INDEX_A	0
-#define DTE_GCR3_INDEX_B	1
-#define DTE_GCR3_INDEX_C	1
-
 #define DTE_GCR3_SHIFT_A	58
 #define DTE_GCR3_SHIFT_B	16
 #define DTE_GCR3_SHIFT_C	43