Remove unused things from drivetrain_config.

Change-Id: Id90bcb2e70357c267d7680be6b4285c853120971
diff --git a/frc971/control_loops/drivetrain/drivetrain_config.h b/frc971/control_loops/drivetrain/drivetrain_config.h
index a2d9fdd..04cfa6c 100644
--- a/frc971/control_loops/drivetrain/drivetrain_config.h
+++ b/frc971/control_loops/drivetrain/drivetrain_config.h
@@ -25,17 +25,9 @@
   ::std::function<StateFeedbackLoop<7, 2, 3>()> make_kf_drivetrain_loop;
 
   double dt;  // Control loop time step.
-  double stall_torque;  // Stall torque in N m.
-  double stall_current;  // Stall current in amps.
-  double free_speed_rpm;  // Free speed in rpm.
-  double free_current;  // Free current in amps.
-  double j;  // CIM moment of inertia in kg m^2.
-  double mass;  // Mass of the robot.
   double robot_radius;  // Robot radius, in meters.
   double wheel_radius;  // Wheel radius, in meters.
-  double r;  // Motor resistance.
   double v;  // Motor velocity constant.
-  double t;  // Torque constant.
 
   // Gear ratios, from wheel to motor shaft.
   double high_gear_ratio;
diff --git a/y2014/control_loops/drivetrain/drivetrain_base.cc b/y2014/control_loops/drivetrain/drivetrain_base.cc
index 1e18b68..e78fa22 100644
--- a/y2014/control_loops/drivetrain/drivetrain_base.cc
+++ b/y2014/control_loops/drivetrain/drivetrain_base.cc
@@ -20,14 +20,15 @@
       ::y2014::control_loops::drivetrain::MakeVelocityDrivetrainLoop,
       ::y2014::control_loops::drivetrain::MakeKFDrivetrainLoop,
 
-      drivetrain::kDt, drivetrain::kStallTorque, drivetrain::kStallCurrent,
-      drivetrain::kFreeSpeedRPM, drivetrain::kFreeCurrent, drivetrain::kJ,
-      drivetrain::kMass, drivetrain::kRobotRadius, drivetrain::kWheelRadius,
-      drivetrain::kR, drivetrain::kV, drivetrain::kT,
+      drivetrain::kDt,
+      drivetrain::kRobotRadius,
+      drivetrain::kWheelRadius,
+      drivetrain::kV,
 
       constants::GetValues().high_gear_ratio,
       constants::GetValues().low_gear_ratio,
-      constants::GetValues().left_drive, constants::GetValues().right_drive};
+      constants::GetValues().left_drive,
+      constants::GetValues().right_drive};
 
   return kDrivetrainConfig;
 };
diff --git a/y2016/control_loops/drivetrain/drivetrain_base.cc b/y2016/control_loops/drivetrain/drivetrain_base.cc
index cd0462b..0065199 100644
--- a/y2016/control_loops/drivetrain/drivetrain_base.cc
+++ b/y2016/control_loops/drivetrain/drivetrain_base.cc
@@ -26,20 +26,12 @@
       ::y2016::control_loops::drivetrain::MakeKFDrivetrainLoop,
 
       drivetrain::kDt,
-      drivetrain::kStallTorque,
-      drivetrain::kStallCurrent,
-      drivetrain::kFreeSpeedRPM,
-      drivetrain::kFreeCurrent,
-      drivetrain::kJ,
-      drivetrain::kMass,
       drivetrain::kRobotRadius,
       drivetrain::kWheelRadius,
-      drivetrain::kR,
       drivetrain::kV,
-      drivetrain::kT,
+
       drivetrain::kHighGearRatio,
       drivetrain::kLowGearRatio,
-
       kThreeStateDriveShifter,
       kThreeStateDriveShifter};