style: Remove unused whitespace

src/node/coinstats.cpp

@@ -95,11 +95,9 @@ static bool GetUTXOStats(CCoinsView* view, BlockManager& blockman, CCoinsStats&
     assert(pcursor);
 
     if (!pindex) {
-        {
         LOCK(cs_main);
         pindex = blockman.LookupBlockIndex(view->GetBestBlock());
     }
-    }
     stats.nHeight = Assert(pindex)->nHeight;
     stats.hashBlock = pindex->GetBlockHash();