KVM: mmio_fault_cr2 is not used

Remove unused variable mmio_fault_cr2.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

arch/x86/include/asm/kvm_host.h

@@ -358,7 +358,6 @@ struct kvm_vcpu_arch {
 	struct fpu guest_fpu;
 	u64 xcr0;
 
-	gva_t mmio_fault_cr2;
 	struct kvm_pio_request pio;
 	void *pio_data;
 

arch/x86/kvm/x86.c

@@ -4561,7 +4561,7 @@ int x86_emulate_instruction(struct kvm_vcpu *vcpu,
 	bool writeback = true;
 
 	kvm_clear_exception_queue(vcpu);
-	vcpu->arch.mmio_fault_cr2 = cr2;
+
 	/*
 	 * TODO: fix emulate.c to use guest_read/write_register
 	 * instead of direct ->regs accesses, can save hundred cycles