vmm: Remove deprecated VmConfig::{kernel, initramfs, cmdline} members

These have been replaced by members of PayloadConfig and should be
removed in v28.0 (mentioned in v26.0 release notes.)

Fixes: #4737

Signed-off-by: Rob Bradford <robert.bradford@intel.com>

vmm/src/lib.rs

@@ -1978,8 +1978,8 @@ const DEVICE_MANAGER_SNAPSHOT_ID: &str = "device-manager";
 mod unit_tests {
     use super::*;
     use config::{
-        CmdlineConfig, ConsoleConfig, ConsoleOutputMode, CpusConfig, HotplugMethod, MemoryConfig,
-        PayloadConfig, RngConfig, VmConfig,
+        ConsoleConfig, ConsoleOutputMode, CpusConfig, HotplugMethod, MemoryConfig, PayloadConfig,
+        RngConfig, VmConfig,
     };
 
     fn create_dummy_vmm() -> Vmm {
@@ -2020,11 +2020,6 @@ mod unit_tests {
                 prefault: false,
                 zones: None,
             },
-            kernel: None,
-            cmdline: CmdlineConfig {
-                args: String::default(),
-            },
-            initramfs: None,
             payload: Some(PayloadConfig {
                 kernel: Some(PathBuf::from("/path/to/kernel")),
                 ..Default::default()