remove youzan && tencent

youzan and tencent do not have the `github page` for open source projects.
They use their own web service to show projects.

Author: 霸都丶傲天

collections/open-source-organizations/index.md

@@ -18,11 +18,9 @@ items:
  - godaddy/godaddy.github.io
  - cloudflare/cloudflare.github.io
  - eleme/eleme.github.io
- - youzan/tech.youzan.com
  - didi/didi.github.io
  - alibaba/alibaba.github.com
  - baidu/baidu.github.io
- - Tencent/opensource.tencent.com
 display_name: Open source organizations
 created_by: benbalter
 image: open-source-organizations.png