chore: remove unused Add import in state_snapshot.rs (#12305)

Update state_snapshot.rs

Author: wedjob0X

crates/evm/core/src/state_snapshot.rs

@@ -1,7 +1,6 @@
 //! Support for snapshotting different states
 
 use alloy_primitives::{U256, map::HashMap};
-use std::ops::Add;
 
 /// Represents all state snapshots
 #[derive(Clone, Debug)]
@@ -30,7 +29,7 @@ impl<T> StateSnapshots<T> {
         let snapshot_state = self.state_snapshots.remove(&id);
 
         // Revert all state snapshots taken after the state snapshot with the `id`
-        let mut to_revert = id.add(U256::from(1));
+        let mut to_revert = id + U256::from(1);
         while to_revert < self.id {
             self.state_snapshots.remove(&to_revert);
             to_revert += U256::from(1);