Move the swerve_drivetrain*.fbs files to frc971/control_loop/swerve

We had ended up with multiple folders, which was irritating.

Also, get rid of the speed fields of the position message until we can
do something with them.

Change-Id: I0eb48bfa8390e361e587f5b4c6c6fc122d730e16
Signed-off-by: James Kuszmaul <jabukuszmaul+collab@gmail.com>
diff --git a/frc971/wpilib/swerve/swerve_module.h b/frc971/wpilib/swerve/swerve_module.h
index c373a31..729ebab 100644
--- a/frc971/wpilib/swerve/swerve_module.h
+++ b/frc971/wpilib/swerve/swerve_module.h
@@ -1,6 +1,7 @@
 #ifndef FRC971_WPILIB_SWERVE_SWERVE_MODULE_H_
 #define FRC971_WPILIB_SWERVE_SWERVE_MODULE_H_
 
+#include "frc971/control_loops/swerve/swerve_drivetrain_output_generated.h"
 #include "frc971/wpilib/talonfx.h"
 
 namespace frc971::wpilib::swerve {