Revert "Merge branch 'dz-add-project-id-to-jupyter' into 'master'"

What does this MR do?

Revert of https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/21341.

What are the relevant issue numbers?

Because of https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/21717#note_101222924

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• Tests added for this feature/bug
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides