Remove unsupported release configs

This drops trunk_food, trunk, and next, none of which are supported
release configs.

Bug: 328495189
Test: manual, TH
Merged-In: Ib02fc4dea3a6d96adb4a0d2b6a732249373844d9
Merged-In: Ia6b6654c0542394c1a5ceb506a74ac2a9aa5a01d
Change-Id: Ia6b6654c0542394c1a5ceb506a74ac2a9aa5a01d
502 files changed