fix 无主键定义实体删除

Src/Dlhis.Sys/Identity/Services/Implements/RoleService.cs

@@ -111,7 +111,12 @@ public class RoleService : IRoleService
         }
         else
         {
-            await _dbContext.DeleteReallyAsync(userRole);
+            if (userRole != null)
+            {
+                await _dbContext.Deleteable<UserRoleEntity>()
+                    .Where(x => x.UserId == request.UserId)
+                    .ExecuteCommandAsync();
+            }
         }
     }