Light refactoring of intrinsics calibration code

Change-Id: Ic7e7a621d9e03ef85e6d3074bff993ee3e470aca
Signed-off-by: James Kuszmaul <jabukuszmaul+collab@gmail.com>
diff --git a/y2023/BUILD b/y2023/BUILD
index cf5d60f..6ba1392 100644
--- a/y2023/BUILD
+++ b/y2023/BUILD
@@ -5,7 +5,7 @@
 robot_downloader(
     name = "pi_download",
     binaries = [
-        "//y2020/vision:calibration",
+        "//frc971/vision:intrinsics_calibration",
         "//y2023/vision:viewer",
         "//y2023/vision:aprilrobotics",
         "//y2022/localizer:localizer_main",
diff --git a/y2023/vision/target_mapping.cc b/y2023/vision/target_mapping.cc
index 43b5353..4f10499 100644
--- a/y2023/vision/target_mapping.cc
+++ b/y2023/vision/target_mapping.cc
@@ -21,7 +21,6 @@
 
 namespace y2023 {
 namespace vision {
-using frc971::vision::CharucoExtractor;
 using frc971::vision::DataAdapter;
 using frc971::vision::ImageCallback;
 using frc971::vision::PoseUtils;