drop shifter support from the drivetrain

Everything is just commented/preprocessored out so we can easily
re-enable it next year.

Change-Id: I4387856548954cf617a525b96a8ffa573c6417a1
6 files changed
tree: 264b5e2ed39a794743cb5a59731927f335a6dbd0
  1. aos/
  2. doc/
  3. frc971/
  4. output/
  5. vision/
  6. .clang-format
  7. .gitignore
  8. README.txt