Revert "fixups"

This reverts commit b72e91f681.

src/ledger.rs

@@ -39,6 +39,10 @@ fn entry_at(file: &mut File, at: u64) -> io::Result<Entry> {
     deserialize_from(file.take(len)).map_err(err_bincode_to_io)
 }
 
+//fn next_offset(file: &mut File) -> io::Result<u64> {
+//    deserialize_from(file.take(SIZEOF_U64)).map_err(err_bincode_to_io)
+//}
+
 fn next_entry(file: &mut File) -> io::Result<Entry> {
     let len = deserialize_from(file.take(SIZEOF_USIZE)).map_err(err_bincode_to_io)?;
     deserialize_from(file.take(len)).map_err(err_bincode_to_io)
@@ -437,6 +441,8 @@ mod tests {
         assert!(entries0.verify(&id));
     }
 
+    fn tmp_ledger_path() -> String {}
+
     #[test]
     fn test_ledger_reader_writer() {
         let ledger_path = tmp_ledger_path("test_ledger_reader_writer");