message: Fix comments in storage.
diff: @@ -1231,8 +1231,7 @@ impl Storage {
  }
  /// Retrieves a block header by height.
  - /// Returns `None` if they are less than the fault tolerance threshold, or if the block is from
  - /// before the most recent emergency upgrade.
  + /// Returns `None` if they are less than the fault tolerance threshold.
  pub(crate) fn read_block_header_and_sufficient_finality_signatures_by_height(
  &self,
  height: u64,
  @@ -1244,8 +1243,7 @@ impl Storage {
  }
  /// Retrieves a block by height.
  - /// Returns `None` if they are less than the fault tolerance threshold, or if the block is from
  - /// before the most recent emergency upgrade.
  + /// Returns `None` if they are less than the fault tolerance threshold.
  fn read_block_and_sufficient_finality_signatures_by_height(
  &self,
  height: u64,
  @@ -1632,8 +1630,7 @@ impl Storage {
  }
  /// Retrieves single block header by height by looking it up in the index and returning it;
  - /// returns `None` if they are less than the fault tolerance threshold, or if the block is from
  - /// before the most recent emergency upgrade.
  + /// returns `None` if they are less than the fault tolerance threshold.
  fn get_block_and_sufficient_finality_signatures_by_height<Tx: Transaction>(
  &self,
  txn: &mut Tx,
  @@ -1711,8 +1708,7 @@ impl Storage {
  }
  /// Retrieves single block header by height by looking it up in the index and returning it;
  - /// returns `None` if they are less than the fault tolerance threshold, or if the block is from
  - /// before the most recent emergency upgrade.
  + /// returns `None` if they are less than the fault tolerance threshold.
  fn get_block_header_and_sufficient_finality_signatures_by_height<Tx: Transaction>(
  &self,
  txn: &mut Tx,
  @@ -1737,8 +1733,7 @@ impl Storage {
  }
  /// Retrieves finality signatures for a block with a given header; returns `None` if they
  - /// are less than the fault tolerance threshold or if the block is from before the most recent
  - /// emergency upgrade.
  + /// are less than the fault tolerance threshold.
  fn get_sufficient_finality_signatures<Tx: Transaction>(
  &self,
  txn: &mut Tx,
  @@ -1783,8 +1778,7 @@ impl Storage {
  }
  /// Retrieves finality signatures for a block with a given block hash; returns `None` if they
  - /// are less than the fault tolerance threshold or if the block is from before the most recent
  - /// emergency upgrade.
  + /// are less than the fault tolerance threshold.
  fn get_sufficient_finality_signatures_by_hash<Tx: Transaction>(
  &self,
  txn: &mut Tx,
  