rpc: Remove unnecessary casting of block height

Author: dongcarl

src/rpc/blockchain.cpp

@@ -1369,7 +1369,7 @@ RPCHelpMan getblockchaininfo()
     const int height = tip->nHeight;
     UniValue obj(UniValue::VOBJ);
     obj.pushKV("chain",                 Params().NetworkIDString());
-    obj.pushKV("blocks",                (int)height);
+    obj.pushKV("blocks",                height);
     obj.pushKV("headers",               pindexBestHeader ? pindexBestHeader->nHeight : -1);
     obj.pushKV("bestblockhash",         tip->GetBlockHash().GetHex());
     obj.pushKV("difficulty",            (double)GetDifficulty(tip));

src/rpc/mining.cpp

@@ -434,7 +434,7 @@ static RPCHelpMan getmininginfo()
     const CChain& active_chain = chainman.ActiveChain();
 
     UniValue obj(UniValue::VOBJ);
-    obj.pushKV("blocks",           (int)active_chain.Height());
+    obj.pushKV("blocks",           active_chain.Height());
     if (BlockAssembler::m_last_block_weight) obj.pushKV("currentblockweight", *BlockAssembler::m_last_block_weight);
     if (BlockAssembler::m_last_block_num_txs) obj.pushKV("currentblocktx", *BlockAssembler::m_last_block_num_txs);
     obj.pushKV("difficulty",       (double)GetDifficulty(active_chain.Tip()));