Revert "Add missing commitments to the block struct. (#138)"

This reverts commit df6a9b8.

src/block.rs

@@ -15,7 +15,6 @@ use crate::transaction::{Transaction, TransactionHash, TransactionOutput};
 pub struct Block {
     pub header: BlockHeader,
     pub body: BlockBody,
-    pub commitments: BlockBodyCommitments,
 }
 
 /// The header of a [Block](`crate::block::Block`).
@@ -30,8 +29,7 @@ pub struct BlockHeader {
     pub state_root: GlobalRoot,
     pub sequencer: ContractAddress,
     pub timestamp: BlockTimestamp,
-    pub n_transactions: u64,
-    pub n_events: u64,
+    // TODO: add missing commitments.
 }
 
 /// The [transactions](`crate::transaction::Transaction`) and their
@@ -43,13 +41,6 @@ pub struct BlockBody {
     pub transaction_hashes: Vec<TransactionHash>,
 }
 
-/// The commitments of the elements in a [BlockBody](`crate::block::BlockBody`).
-#[derive(Debug, Default, Clone, Eq, PartialEq, Hash, Deserialize, Serialize, PartialOrd, Ord)]
-pub struct BlockBodyCommitments {
-    pub transactions_commitment: StarkHash,
-    pub events_commitment: StarkHash,
-}
-
 /// The status of a [Block](`crate::block::Block`).
 #[derive(Debug, Copy, Clone, Eq, PartialEq, Hash, Deserialize, Serialize, PartialOrd, Ord)]
 pub enum BlockStatus {