Remove useless pub trait method (#3076)

libs/remote_storage/src/lib.rs

@@ -104,11 +104,6 @@ pub trait RemoteStorage: Send + Sync + 'static {
     ) -> Result<Download, DownloadError>;
 
     async fn delete(&self, path: &RemotePath) -> anyhow::Result<()>;
-
-    /// Downcast to LocalFs implementation. For tests.
-    fn as_local(&self) -> Option<&LocalFs> {
-        None
-    }
 }
 
 pub struct Download {

libs/remote_storage/src/local_fs.rs

@@ -283,10 +283,6 @@ impl RemoteStorage for LocalFs {
             bail!("File {file_path:?} either does not exist or is not a file")
         }
     }
-
-    fn as_local(&self) -> Option<&LocalFs> {
-        Some(self)
-    }
 }
 
 fn storage_metadata_path(original_path: &Path) -> PathBuf {