Remove the just-deleted file also from the CI script

.gitlab-ci.yml

@@ -8,7 +8,7 @@ pages:
   - tar czf public/pandas-tutorial-tasks--jureca.tar.gz --transform 's,^,pandas-tutorial-tasks/,' Introduction-to-Pandas--JURECA--tasks.ipynb Introduction-to-Pandas--JURECA--solution.ipynb lost.json nest-data.csv
   - cp Introduction-to-Pandas--slides.ipynb public/
   - cp Introduction-to-Pandas--slides.pdf public/
-  - tar czf public/pandas-tutorial-slides.tar.gz  --transform 's,^,pandas-tutorial-slides/,' Introduction-to-Pandas--slides.html custom.css custom.js fzj.js img/ reveal.js/
+  - tar czf public/pandas-tutorial-slides.tar.gz  --transform 's,^,pandas-tutorial-slides/,' Introduction-to-Pandas--slides.html custom.css fzj.js img/ reveal.js/
   - git reset --hard origin/pages
   - git checkout -f pages
   - cp index.html public/