Revert "gitlab-ci: job must be called 'pages' to deploy to GitLab Pages"

This reverts commit c5daf198.

Turns I was confused here.  Yes, the job has to be called "pages" if the
job is deploying to GitLab Pages.  But in the case of `fdroid nightly`, the
thing that is deploying to GitLab Pages is the .gitlab-ci.yml that is in
the *-nightly repo, which is auto-generated by `fdroid nightly`.

fdroidserver#649
parent 080f93eb
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