message: rafs: drop unused unit tests
  It is not needed.
diff: @@ -90,17 +90,6 @@ mod tests {
  assert_eq!(buf.to_vec(), compressed.to_vec());
  }
  - #[test]
  - fn test_lz4_compress_decompress_0_byte() {
  - let buf = Vec::new();
  - let compressed = lz4_compress(&buf).unwrap();
  - let mut decompressed = vec![0; buf.len()];
  - let sz = decompress(&compressed, decompressed.as_mut_slice()).unwrap();
  -
  - assert_eq!(sz, 0);
  - assert_eq!(buf, decompressed);
  - }
  -
  #[test]
  fn test_lz4_compress_decompress_1_byte() {
  let buf = vec![0x1u8];
  