chore: fix compiler warnings

Signed-off-by: bestmike007 <[email protected]>

Author: bestmike007

stacks-common/src/util/hash.rs

@@ -429,7 +429,7 @@ where
             row_hashes.reserve(nodes[i].len() / 2);
 
             for j in 0..(nodes[i].len() / 2) {
-                let h = MerkleTree::get_node_hash(&nodes[i][(2 * j)], &nodes[i][2 * j + 1]);
+                let h = MerkleTree::get_node_hash(&nodes[i][2 * j], &nodes[i][2 * j + 1]);
                 row_hashes.push(h);
             }
 

stackslib/src/chainstate/stacks/index/storage.rs

@@ -875,7 +875,7 @@ impl<T: MarfTrieId> TrieRAM<T> {
         for j in 0..node_data.len() {
             let next_node = &mut self.data[node_data[j] as usize].0;
             if !next_node.is_leaf() {
-                let mut ptrs = next_node.ptrs_mut();
+                let ptrs = next_node.ptrs_mut();
                 let num_children = ptrs.len();
                 for k in 0..num_children {
                     if ptrs[k].id != TrieNodeID::Empty as u8 && !is_backptr(ptrs[k].id) {