fix: mempool stats reflects unconfirmed pool (#3398)

Description
---
Mempool stats total grams from uncofirmed pool only.

How Has This Been Tested?
---
Manually.

base_layer/core/src/mempool/mempool_storage.rs

@@ -219,18 +219,13 @@ impl MempoolStorage {
         Ok(self.unconfirmed_pool.len())
     }
 
-    // Returns the total weight of all transactions stored in the Mempool.
-    fn calculate_weight(&self) -> Result<u64, MempoolError> {
-        Ok(self.unconfirmed_pool.calculate_weight() + self.reorg_pool.calculate_weight()?)
-    }
-
     /// Gathers and returns the stats of the Mempool.
     pub fn stats(&self) -> Result<StatsResponse, MempoolError> {
         Ok(StatsResponse {
             total_txs: self.len()?,
             unconfirmed_txs: self.unconfirmed_pool.len(),
             reorg_txs: self.reorg_pool.len()?,
-            total_weight: self.calculate_weight()?,
+            total_weight: self.unconfirmed_pool.calculate_weight(),
         })
     }
 

base_layer/core/src/mempool/reorg_pool/reorg_pool.rs

@@ -132,15 +132,6 @@ impl ReorgPool {
             .map_err(|e| ReorgPoolError::BackendError(e.to_string()))?
             .snapshot())
     }
-
-    /// Returns the total weight of all transactions stored in the pool.
-    pub fn calculate_weight(&self) -> Result<u64, ReorgPoolError> {
-        Ok(self
-            .pool_storage
-            .write()
-            .map_err(|e| ReorgPoolError::BackendError(e.to_string()))?
-            .calculate_weight())
-    }
 }
 
 impl Clone for ReorgPool {

base_layer/core/src/mempool/reorg_pool/reorg_pool_storage.rs

@@ -131,11 +131,4 @@ impl ReorgPoolStorage {
     pub fn snapshot(&mut self) -> Vec<Arc<Transaction>> {
         self.txs_by_signature.iter().map(|(_, tx)| tx).cloned().collect()
     }
-
-    /// Returns the total weight of all transactions stored in the pool.
-    pub fn calculate_weight(&mut self) -> u64 {
-        self.txs_by_signature
-            .iter()
-            .fold(0, |weight, (_, tx)| weight + tx.calculate_weight())
-    }
 }

base_layer/core/tests/mempool.rs

@@ -199,7 +199,7 @@ async fn test_insert_and_process_published_block() {
     assert_eq!(stats.total_txs, 0);
     assert_eq!(stats.unconfirmed_txs, 0);
     assert_eq!(stats.reorg_txs, 1);
-    assert_eq!(stats.total_weight, 30);
+    assert_eq!(stats.total_weight, 0);
 }
 
 #[tokio::test]