Remove dead code from paging and PTE management

sdk/xtdk/amd64/mmtypes.h

@@ -142,7 +142,6 @@ typedef struct _HARDWARE_PTE
 typedef struct _MMPAGEMAP_INFO
 {
     BOOLEAN Xpa;
-    ULONGLONG EmptyPteList;
     ULONGLONG PteBase;
     ULONGLONG PdeBase;
     ULONGLONG PpeBase;

sdk/xtdk/i686/mmtypes.h

@@ -165,7 +165,6 @@ typedef union _HARDWARE_PTE
 typedef struct _MMPAGEMAP_INFO
 {
     BOOLEAN Xpa;
-    ULONG EmptyPteList;
     ULONG PteBase;
     ULONG PdeBase;
     ULONG PdiShift;