KVM: Remove duplicated declaration of kvm_vcpu_kick

There are two declarations of kvm_vcpu_kick() in kvm_host.h where
one of them is redundant. Remove to keep the git grep a bit cleaner.
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

include/linux/kvm_host.h

@@ -982,7 +982,6 @@ void kvm_arch_destroy_vm(struct kvm *kvm);
 void kvm_arch_sync_events(struct kvm *kvm);
 
 int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu);
-void kvm_vcpu_kick(struct kvm_vcpu *vcpu);
 
 bool kvm_is_reserved_pfn(kvm_pfn_t pfn);
 bool kvm_is_zone_device_pfn(kvm_pfn_t pfn);