chore: clippy fix

Signed-off-by: kjuulh <contact@kjuulh.io>

crates/cuddle-please/tests/common/mod.rs

@@ -6,6 +6,7 @@ use std::{
     sync::{Arc, Mutex},
 };
 
+#[derive(Default)]
 struct BufferInner {
     pub stdout: Vec<u8>,
     pub stderr: Vec<u8>,
@@ -84,14 +85,7 @@ impl Ui for BufferUi {
     }
 }
 
-impl Default for BufferInner {
-    fn default() -> Self {
-        Self {
-            stdout: Vec::new(),
-            stderr: Vec::new(),
-        }
-    }
-}
+
 
 impl Default for BufferUi {
     fn default() -> Self {