playstation: Drop unused symbols

This fixes compile time warnings.
4 jobs for wip/aplazas/warnings in 22 minutes and 32 seconds (queued for 4 seconds)
Status Name Job ID Coverage
  Build
passed flatpak:app #66227

00:12:52

 
  Test
passed flatpak:tests #66228

00:04:21

 
  Review
passed review #66229

00:00:27

passed stop_review #66230
manual

00:04:50