KVM: MMU: Remove unused large page marker

This has not been used for some time, as the same information is available
in the page header.
Signed-off-by: Avi Kivity <avi@qumranet.com>

drivers/kvm/mmu.c

@@ -94,7 +94,6 @@ static int dbg = 1;
 #define PT_FIRST_AVAIL_BITS_SHIFT 9
 #define PT64_SECOND_AVAIL_BITS_SHIFT 52
 
-#define PT_SHADOW_PS_MARK (1ULL << PT_FIRST_AVAIL_BITS_SHIFT)
 #define PT_SHADOW_IO_MARK (1ULL << PT_FIRST_AVAIL_BITS_SHIFT)
 
 #define VALID_PAGE(x) ((x) != INVALID_PAGE)

drivers/kvm/paging_tmpl.h

@@ -384,8 +384,6 @@ static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,
 	}
 
 	if (walker->level == PT_DIRECTORY_LEVEL) {
-		if (prev_shadow_ent)
-			*prev_shadow_ent |= PT_SHADOW_PS_MARK;
 		FNAME(set_pde)(vcpu, guest_ent, shadow_ent,
 			       walker->inherited_ar, user_fault, write_fault,
 			       ptwrite, walker, walker->gfn);