Remove hardcoded direct-release project list

The direct-release option was already moved to the projects.yaml (thanks
for Monty - Id6d25b3f806d2173d53cb06fc4ee45669c645737), so, we can remove
it from jeepyb.

Change-Id: I3894065ae08304abafaad657fbf9fd25824fcd02
Merge "Remove hardcoded direct-release project list"