fix(gitlab_datasource): remove unused datasources/github.py (#3374)

* fix(gitlab_datasource): remove unused datasources/github.py

* chore(gitlab_datasource): bump manifest version to 0.3.12

---------

Co-authored-by: Harsh Kashyap <harshkashyap@Harshs-MacBook-Pro.local>

Author: Harsh23Kashyap

datasources/gitlab_datasource/datasources/github.py

@@ -1,4 +1,4 @@
-version: 0.3.11
+version: 0.3.12
 type: plugin
 author: langgenius
 name: gitlab_datasource