[wpilib] Remove MotorController::StopMotor() (#8483)

It does the same thing as Disable() in practice, and MotorSafety has its
own StopMotor() function.

wpilibj/src/main/java/org/wpilib/hardware/motor/MotorController.java

@@ -71,10 +71,4 @@ public interface MotorController {
 
   /** Disable the motor controller. */
   void disable();
-
-  /**
-   * Stops motor movement. Motor can be moved again by calling set without having to re-enable the
-   * motor.
-   */
-  void stopMotor();
 }

wpilibj/src/main/java/org/wpilib/hardware/motor/PWMMotorController.java

@@ -225,12 +225,7 @@ public abstract class PWMMotorController extends MotorSafety
 
   @Override
   public void stopMotor() {
-    // Don't use set(0) as that will feed the watch kitty
-    m_pwm.setPulseTimeMicroseconds(0);
-
-    for (var follower : m_followers) {
-      follower.stopMotor();
-    }
+    disable();
   }
 
   @Override