Remove is_empty and run cargo fmt

src/db.rs

@@ -28,13 +28,9 @@ use crate::transactions::SAVEPOINT_TABLE;
 #[cfg(feature = "logging")]
 use log::{info, warn};
 
+#[allow(clippy::len_without_is_empty)]
 /// Implements persistent storage for a database.
 pub trait StorageBackend: 'static + Debug + Send + Sync {
-    /// Whether the current storage backend is of zero length.
-    fn is_empty(&self) -> Result<bool, io::Error> {
-        Ok(self.len()? == 0)
-    }
-
     /// Gets the current length of the storage.
     fn len(&self) -> Result<u64, io::Error>;
 

src/tree_store/page_store/file_backend/mod.rs

@@ -11,4 +11,4 @@ pub use windows::FileBackend;
 #[cfg(not(any(windows, unix, target_os = "wasi")))]
 mod unsupported;
 #[cfg(not(any(windows, unix, target_os = "wasi")))]
-pub use unsupported::FileBackend;
+pub use unsupported::FileBackend;

src/tree_store/page_store/file_backend/unsupported.rs

@@ -33,4 +33,4 @@ impl StorageBackend for FileBackend {
     fn write(&self, _: u64, _: &[u8]) -> Result<(), io::Error> {
         unimplemented!()
     }
-}
+}