Remove unnecessary join against releases table

This gets rid of the warning:

DBIx::Class::Storage::DBI::select_single(): Query returned more than one row. SQL that returns multiple rows is DEPRECATED for ->find and ->single at /home/eelco/Dev/hydra/src/script/../lib/Hydra/Controller/Project.pm line 15

Created by  Eelco Dolstra  on May 1, 2014
34O5UJ63CP5D5F2GP7HYN77UVEMLP2GR2G7VUZ4DK6SS5HUPB2AQC
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