Rename all /orin2 camera channels to /imu

This makes things more internall consistent.

Change-Id: Ia1dfcf6bde96874dae518a72b5c671cae8eb7fe5
Signed-off-by: James Kuszmaul <jabukuszmaul+collab@gmail.com>
diff --git a/y2024/localizer/localizer_replay.cc b/y2024/localizer/localizer_replay.cc
index 763ad36..c2c4c16 100644
--- a/y2024/localizer/localizer_replay.cc
+++ b/y2024/localizer/localizer_replay.cc
@@ -33,7 +33,7 @@
   aos::logger::LogReader reader(logfiles, &config.message());
 
   reader.RemapLoggedChannel("/localizer", "y2024.localizer.Status");
-  for (const auto orin : {"orin1", "orin2"}) {
+  for (const auto orin : {"orin1", "imu"}) {
     for (const auto camera : {"camera0", "camera1"}) {
       reader.RemapLoggedChannel(absl::StrCat("/", orin, "/", camera),
                                 "y2024.localizer.Visualization");