KVM: x86: invalid_list not used anymore in mmu_shrink_scan

'invalid_list' is now gathered in KVM_MMU_ZAP_OLDEST_MMU_PAGES.
Signed-off-by: Liang Chen <liangchen.linux@gmail.com>
Link: https://lore.kernel.org/r/20240509044710.18788-1-liangchen.linux@gmail.comSigned-off-by: Sean Christopherson <seanjc@google.com>

arch/x86/kvm/mmu/mmu.c

@@ -6893,7 +6893,6 @@ static unsigned long mmu_shrink_scan(struct shrinker *shrink,
 
 	list_for_each_entry(kvm, &vm_list, vm_list) {
 		int idx;
-		LIST_HEAD(invalid_list);
 
 		/*
 		 * Never scan more than sc->nr_to_scan VM instances.