Make import docs more prominent.

doc/raketasks/README.md

 + [Backup restore](backup_restore.md)
 + [Cleanup](cleanup.md)
 + [Features](features.md)
-+ [Maintenance](maintenance.md)
++ [Maintenance](maintenance.md) and self-checks
 + [User management](user_management.md)
 + [Web hooks](web_hooks.md)
++ [Import](import.md) of git repositories in bulk

doc/raketasks/maintenance.md

@@ -110,32 +110,3 @@ If necessary, remove the `tmp/repo_satellites` directory and rerun the command b
 ```
 bundle exec rake gitlab:satellites:create RAILS_ENV=production
 ```
-
-### Import bare repositories into GitLab project instance
-
-Notes:
-
-* project owner will be a first admin
-* groups will be created as needed
-* group owner will be the first admin
-* existing projects will be skipped
-
-How to use:
-
-1. copy your bare repos under git repos_path (see `config/gitlab.yml` gitlab_shell -> repos_path)
-2. run the command below
-
-```
-bundle exec rake gitlab:import:repos RAILS_ENV=production
-```
-
-Example output:
-
-```
-Processing abcd.git
- * Created abcd (abcd.git)
-Processing group/xyz.git
- * Created Group group (2)
- * Created xyz (group/xyz.git)
-[...]
-```