message: chore(hardfork): apply review suggestions about block timestamp in since
diff: @@ -588,11 +588,6 @@ impl<'a, DL: HeaderProvider> SinceVerifier<'a, DL> {
  self.block_median_time(&parent_hash)
  }
  - fn parent_block_time(&self, block_hash: &Byte32) -> u64 {
  - let (timestamp, _, _) = self.data_loader.timestamp_and_parent(block_hash);
  - timestamp
  - }
  -
  fn block_median_time(&self, block_hash: &Byte32) -> u64 {
  if let Some(median_time) = self.median_timestamps_cache.borrow().peek(block_hash) {
  return *median_time;
  @@ -692,7 +687,10 @@ impl<'a, DL: HeaderProvider> SinceVerifier<'a, DL> {
  let base_timestamp = if hardfork_switch
  .is_block_ts_as_relative_since_start_enabled(epoch_number)
  {
  - self.parent_block_time(&info.block_hash)
  + self.data_loader
  + .get_header(&info.block_hash)
  + .expect("header exist")
  + .timestamp()
  } else {
  self.parent_median_time(&info.block_hash)
  };
  