test(server): fix auth endpoint RPC stub lint

Author: TaylorMutch

crates/openshell-server/tests/auth_endpoint_integration.rs

@@ -782,17 +782,15 @@ impl openshell_core::proto::open_shell_server::OpenShell for TestOpenShell {
     async fn issue_sandbox_token(
         &self,
         _request: tonic::Request<openshell_core::proto::IssueSandboxTokenRequest>,
-    ) -> Result<tonic::Response<openshell_core::proto::IssueSandboxTokenResponse>, tonic::Status>
-    {
-        Err(tonic::Status::unimplemented("not implemented in test"))
+    ) -> Result<Response<openshell_core::proto::IssueSandboxTokenResponse>, Status> {
+        Err(Status::unimplemented("not implemented in test"))
     }
 
     async fn refresh_sandbox_token(
         &self,
         _request: tonic::Request<openshell_core::proto::RefreshSandboxTokenRequest>,
-    ) -> Result<tonic::Response<openshell_core::proto::RefreshSandboxTokenResponse>, tonic::Status>
-    {
-        Err(tonic::Status::unimplemented("not implemented in test"))
+    ) -> Result<Response<openshell_core::proto::RefreshSandboxTokenResponse>, Status> {
+        Err(Status::unimplemented("not implemented in test"))
     }
 
     async fn connect_supervisor(