kvm: x86: Remove stale declaration of kvm_no_apic_vcpu

This variable was renamed to kvm_has_noapic_vcpu in commit
6e4e3b4d

 ("KVM: Stop using deprecated jump label APIs").

Signed-off-by: Jim Mattson <jmattson@google.com>
Message-Id: <20211021185449.3471763-1-jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>