KVM: X86: Remove kvm_register_clear_available()

It has no user.
Signed-off-by: Lai Jiangshan <laijs@linux.alibaba.com>
Message-Id: <20211108124407.12187-15-jiangshanlai@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/kvm_cache_regs.h

@@ -68,13 +68,6 @@ static inline void kvm_register_mark_available(struct kvm_vcpu *vcpu,
 	__set_bit(reg, (unsigned long *)&vcpu->arch.regs_avail);
 }
 
-static inline void kvm_register_clear_available(struct kvm_vcpu *vcpu,
-					       enum kvm_reg reg)
-{
-	__clear_bit(reg, (unsigned long *)&vcpu->arch.regs_avail);
-	__clear_bit(reg, (unsigned long *)&vcpu->arch.regs_dirty);
-}
-
 static inline void kvm_register_mark_dirty(struct kvm_vcpu *vcpu,
 					   enum kvm_reg reg)
 {