Merge branch 'master' of http://git.fwt.com/Hotline/hotline

src/Hotline.Api/Controllers/KnowledgeCommonController.cs

@@ -146,9 +146,6 @@ namespace Hotline.Api.Controllers
         [HttpGet("typelist")]
         public async Task<List<KnowledgeType>> GetTypeList(string? ParentId, bool? IsEnable)
         {
-            if (string.IsNullOrEmpty(ParentId))
-                ParentId = Guid.Empty.ToString();
-
             return await _knowledgeTypeRepository
                 .Queryable()
                 .Where(p => p.ParentId == ParentId)