Clean up paging code

xtoskrnl/mm/amd64/pagemap.cc

@@ -315,21 +315,6 @@ MM::PageMap::GetPteDistance(PMMPTE EndPte,
     return ((ULONG_PTR)EndPte - (ULONG_PTR)StartPte) / sizeof(MMPTE);
 }
 
-/**
- * Gets the terminator value for a PTE list.
- *
- * @return This routine returns the terminator value for a PTE list.
- *
- * @since XT 1.0
- */
-XTAPI
-ULONG_PTR
-MM::PageMap::GetPteListTerminator(VOID)
-{
-    /* Return PTE list terminator value */
-    return 0xFFFFFFFF;
-}
-
 /**
  * Gets the Offset of the PTE (Page Table Entry), that maps given address.
  *