KVM: x86: hyper-v: Drop unused kvm_hv_vapic_assist_page_enabled()

kvm_hv_vapic_assist_page_enabled() seems to be unused since its
introduction in commit 10388a07 ("KVM: Add HYPER-V apic access MSRs"),
drop it.
Reported-by: NSean Christopherson <seanjc@google.com>
Signed-off-by: NVitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20210126134816.1880136-4-vkuznets@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/lapic.h

@@ -125,11 +125,6 @@ int kvm_x2apic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
 int kvm_hv_vapic_msr_write(struct kvm_vcpu *vcpu, u32 msr, u64 data);
 int kvm_hv_vapic_msr_read(struct kvm_vcpu *vcpu, u32 msr, u64 *data);
 
-static inline bool kvm_hv_vapic_assist_page_enabled(struct kvm_vcpu *vcpu)
-{
-	return vcpu->arch.hyperv.hv_vapic & HV_X64_MSR_VP_ASSIST_PAGE_ENABLE;
-}
-
 int kvm_lapic_enable_pv_eoi(struct kvm_vcpu *vcpu, u64 data, unsigned long len);
 void kvm_lapic_exit(void);