Fix clippy warning

Fixes new clippy warning

Signed-off-by: James Sturtevant <[email protected]>

src/runtime/linux.rs

@@ -167,8 +167,10 @@ pub struct LinuxIdMapping {
 #[derive(Clone, Copy, Debug, Deserialize, Eq, PartialEq, Serialize)]
 #[serde(rename_all = "lowercase")]
 /// Device types
+#[derive(Default)]
 pub enum LinuxDeviceType {
     /// All
+    #[default]
     A,
 
     /// block (buffered)
@@ -184,12 +186,6 @@ pub enum LinuxDeviceType {
     P,
 }
 
-impl Default for LinuxDeviceType {
-    fn default() -> LinuxDeviceType {
-        LinuxDeviceType::A
-    }
-}
-
 impl LinuxDeviceType {
     /// Retrieve a string reference for the device type.
     pub fn as_str(&self) -> &str {