clean up

Author: CTTY

crates/iceberg/src/io/file_io.rs

@@ -407,14 +407,14 @@ impl OutputFile {
 
     /// Checks if file exists.
     pub async fn exists(&self) -> Result<bool> {
-        Ok(self.storage.exists(&self.path).await?)
+        self.storage.exists(&self.path).await?
     }
 
     /// Deletes file.
     ///
     /// If the file does not exist, it will not return error.
     pub async fn delete(&self) -> Result<()> {
-        Ok(self.storage.delete(&self.path).await?)
+        self.storage.delete(&self.path).await?
     }
 
     /// Converts into [`InputFile`].

crates/iceberg/src/io/storage_memory.rs

@@ -28,10 +28,6 @@ use crate::io::{
     Extensions, FileMetadata, FileRead, FileWrite, InputFile, OutputFile, Storage, StorageBuilder,
 };
 
-pub(crate) fn memory_config_build() -> Result<Operator> {
-    Ok(Operator::from_config(MemoryConfig::default())?.finish())
-}
-
 /// Memory storage implementation using OpenDAL
 #[derive(Debug, Clone)]
 pub struct OpenDALMemoryStorage {