message: Remove BlockInfo::timestamp getter
diff: @@ -61,13 +61,6 @@ pub struct BlockInfo {
  pub chain_id: String,
  }
  -impl BlockInfo {
  - /// Returns the block creation time as a Timestamp in nanosecond precision
  - pub fn timestamp(&self) -> Timestamp {
  - self.time
  - }
  -}
  -
  /// Additional information from [MsgInstantiateContract] and [MsgExecuteContract], which is passed
  /// along with the contract execution message into the `instantiate` and `execute` entry points.
  ///
  