clean code

Author: Jicheng Lu

src/Plugins/BotSharp.Plugin.Qdrant/QdrantDb.cs

@@ -147,7 +147,6 @@ public async Task<StringIdPagedItems<VectorCollectionData>> GetPagedCollectionDa
         OrderBy? orderBy = BuildOrderBy(filter.OrderBy);
 
         var client = GetClient();
-        var tasks = new List<Task>();
 
         var totalCountTask = client.CountAsync(collectionName, filter: queryFilter);
         var dataResponseTask = client.ScrollAsync(