[attestation] Remove restricted API check for requestAttestation

As the remote attestation feature is complete.

Test: atest VmAttestationTests
Change-Id: I555598add1c619ba3d303a0538ee593bad297dbb
diff --git a/virtualizationservice/src/rkpvm.rs b/virtualizationservice/src/rkpvm.rs
index 79e09b0..67ba740 100644
--- a/virtualizationservice/src/rkpvm.rs
+++ b/virtualizationservice/src/rkpvm.rs
@@ -35,7 +35,7 @@
     let request = Request::RequestClientVmAttestation(params);
     match vm.process_request(request).context("Failed to process request")? {
         Response::RequestClientVmAttestation(cert) => Ok(cert),
-        _ => bail!("Incorrect response type"),
+        other => bail!("Incorrect response type {other:?}"),
     }
 }