rpg/ui/scene moved to archive/ earlier left a handful of otherwise-generic
systems with dead references into them:
- asset/loader/chunk existed solely to load rpg overworld map chunks
(tile_t, worldpos_t) - deleted outright, along with its
ASSET_LOADER_TYPE_CHUNK entry in assetloader.c/h.
- save/slot wrapped party_t/storyflagval_t/map-name/cutscene-path, which is
100% rpg save data - deleted outright (save.c/h, savedevice.c/h and the
Linux save backend keep their generic settings/device-discovery logic,
just lose the slot read/write pieces that only existed for it).
- locale/localemanager.c and test/CMakeLists.txt/test/save/* had a few
stray includes and test cases that only existed for the now-gone code.
Also restores assets/locale/en_US.po (copied back from archive/assets/) -
locale init still needs a real locale file to boot into, even with the
asset-moving/archiving done separately.
Co-Authored-By: Claude Sonnet 5 <[email protected]>