ARM: KVM: Remove __kvm_hyp_exit/__kvm_hyp_exit_end

I have no idea what these were for - probably a leftover from an
early implementation. Good bye!
Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>

arch/arm/include/asm/kvm_asm.h

@@ -55,9 +55,6 @@ struct kvm_vcpu;
 extern char __kvm_hyp_init[];
 extern char __kvm_hyp_init_end[];
 
-extern char __kvm_hyp_exit[];
-extern char __kvm_hyp_exit_end[];
-
 extern char __kvm_hyp_vector[];
 
 extern void __kvm_flush_vm_context(void);