Swap y2024 drivetrain to use ConstantsFetcher

Simultaneously, remove the line following configuration from the y2024
drivetrain, since that code will not be relevant to this year.

Change-Id: I536bd2dd18080bbaae5d83cb151bbd2353d7896c
Signed-off-by: James Kuszmaul <jabukuszmaul+collab@gmail.com>
diff --git a/y2024/control_loops/drivetrain/drivetrain_base.h b/y2024/control_loops/drivetrain/drivetrain_base.h
index e7eb581..fbe85f4 100644
--- a/y2024/control_loops/drivetrain/drivetrain_base.h
+++ b/y2024/control_loops/drivetrain/drivetrain_base.h
@@ -1,12 +1,13 @@
 #ifndef Y2024_CONTROL_LOOPS_DRIVETRAIN_DRIVETRAIN_BASE_H_
 #define Y2024_CONTROL_LOOPS_DRIVETRAIN_DRIVETRAIN_BASE_H_
 
+#include "aos/events/event_loop.h"
 #include "frc971/control_loops/drivetrain/drivetrain_config.h"
 
 namespace y2024::control_loops::drivetrain {
 
-const ::frc971::control_loops::drivetrain::DrivetrainConfig<double> &
-GetDrivetrainConfig();
+const ::frc971::control_loops::drivetrain::DrivetrainConfig<double>
+GetDrivetrainConfig(aos::EventLoop *event_loop);
 
 }  // namespace y2024::control_loops::drivetrain