fix(machine_config): remove unused MachineConfigUpdate import in tests

Signed-off-by: Nikita Kalyazin <nikita.kalyazin@e2b.dev>

Author: kalyazin

src/vmm/src/vmm_config/machine_config.rs

@@ -288,7 +288,7 @@ impl MachineConfig {
 #[cfg(test)]
 mod tests {
     use crate::cpu_config::templates::{CpuTemplateType, CustomCpuTemplate, StaticCpuTemplate};
-    use crate::vmm_config::machine_config::{MachineConfig, MachineConfigUpdate};
+    use crate::vmm_config::machine_config::MachineConfig;
 
     // Ensure the special (de)serialization logic for the cpu_template field works:
     // only static cpu templates can be specified via the machine-config endpoint, but