cereal: Remove proto-related files.

Proto depedency was removed in change aosp/1243151; we should be
able to remove the codegen and generated code completely from
our repository.

Change-Id: Id7a9b171909e2e4ad0237b464fb4468eace77bb0
3 files changed
tree: a3bc53bcbec3648dc714321c7eee5655e53e1089
  1. registry/