style(api): reformat two error arms

Pre-existing rustfmt drift on the branch base; `just ci` fails on it
before reaching anything else.

crates/arr-api/src/series.rs

@@ -734,11 +734,7 @@ async fn remove_library_files(state: &AppState, scope: FileScope) -> Result<(),
             Ok(metadata) => metadata,
             // Already gone is the state we wanted.
             Err(error) if error.kind() == std::io::ErrorKind::NotFound => continue,
-            Err(error) => {
-                return Err(ApiError::Filesystem(format!(
-                    "files not removed: {error}"
-                )))
-            }
+            Err(error) => return Err(ApiError::Filesystem(format!("files not removed: {error}"))),
         };
         let removed = if metadata.is_dir() {
             tokio::fs::remove_dir_all(&target).await
@@ -748,11 +744,7 @@ async fn remove_library_files(state: &AppState, scope: FileScope) -> Result<(),
         match removed {
             Ok(()) => tracing::info!(target = %target.display(), "removed library files"),
             Err(error) if error.kind() == std::io::ErrorKind::NotFound => {}
-            Err(error) => {
-                return Err(ApiError::Filesystem(format!(
-                    "files not removed: {error}"
-                )))
-            }
+            Err(error) => return Err(ApiError::Filesystem(format!("files not removed: {error}"))),
         }
     }
     Ok(())