KVM: SVM: Remove an unnecessary prototype declaration of sev_flush_asids()

Remove the forward declaration of sev_flush_asids(), which is only a few
lines above the function itself.

No functional change intended.

Reviewed by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Brijesh Singh <brijesh.singh@amd.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210422021125.3417167-15-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/svm/sev.c

@@ -58,7 +58,6 @@ module_param_named(sev_es, sev_es_enabled, bool, 0444);
 #endif /* CONFIG_KVM_AMD_SEV */
 
 static u8 sev_enc_bit;
-static int sev_flush_asids(void);
 static DECLARE_RWSEM(sev_deactivate_lock);
 static DEFINE_MUTEX(sev_bitmap_lock);
 unsigned int max_sev_asid;