delete github-basics assignment task

there is not a github-basics assignment.md file to translate

.github/ISSUE_TEMPLATE/translations_checklist.md

@@ -13,7 +13,6 @@ assignees: ''
    - [ ] intro-to-programming-languages README
    - [ ] intro-to-programming-languages assignment
    - [ ] github-basics README
-   - [ ] github-basics assignment
    - [ ] accessibility README
    - [ ] accessibility assignment
 - [ ] 2-js-basics base README