KVM: VMX: Remove vcpu_vmx's defunct copy of host_pkru

Remove vcpu_vmx.host_pkru, which got left behind when PKRU support was
moved to common x86 code.

No functional change intended.

Fixes: 3748613 ("KVM: x86: Fix pkru save/restore when guest CR4.PKE=0, move it to x86.c")
Signed-off-by: Sean Christopherson <[email protected]>
Message-Id: <[email protected]>
Reviewed-by: Vitaly Kuznetsov <[email protected]>
Reviewed-by: Jim Mattson <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>

Author: Sean Christopherson

arch/x86/kvm/vmx/vmx.h

@@ -288,8 +288,6 @@ struct vcpu_vmx {
 
 	u64 current_tsc_ratio;
 
-	u32 host_pkru;
-
 	unsigned long host_debugctlmsr;
 
 	/*