only return non-deleted object

src/rpc/handlers/LedgerData.cpp

@@ -138,6 +138,7 @@ doLedgerData(Context const& context)
         for (size_t i = 0; i < objs.size(); ++i)
         {
             auto&& obj = objs[i];
+            if (obj.size())
                 results.push_back({std::move(keys[i]), std::move(obj)});
         }
         if (*diffCursor > lgrInfo.seq)