Revert "tool: fix diagnostics broken by renaming Imu to CorrectedImu in pb."
Revert "tool: fix diagnostics broken by renaming Imu to CorrectedImu in pb."

This reverts commit 488fc0fbe5a2db02dcd08731b38c3ca42ae85458.

startcode/apollo,startcode/apollo,startcode/apollo,startcode/apollo,startcode/apollo,startcode/apollo