[wpilib] Remove deprecated MotorControllerGroup (#8349)

wpilibc/src/main/native/include/wpi/hardware/motor/MotorControllerGroup.hpp

@@ -1,74 +0,0 @@
-// Copyright (c) FIRST and other WPILib contributors.
-// Open Source Software; you can modify and/or share it under the terms of
-// the WPILib BSD license file in the root directory of this project.
-
-#pragma once
-
-#include <functional>
-#include <vector>
-
-#include "wpi/hardware/motor/MotorController.hpp"
-#include "wpi/util/deprecated.hpp"
-#include "wpi/util/sendable/Sendable.hpp"
-#include "wpi/util/sendable/SendableHelper.hpp"
-
-WPI_IGNORE_DEPRECATED
-
-namespace wpi {
-
-/**
- * Allows multiple MotorController objects to be linked together.
- */
-class [[deprecated(
-    "Use PWMMotorController::AddFollower() or if using CAN motor controllers,"
-    "use their method of following.")]] MotorControllerGroup
-    : public wpi::util::Sendable,
-      public MotorController,
-      public wpi::util::SendableHelper<MotorControllerGroup> {
- public:
-  /**
-   * Create a new MotorControllerGroup with the provided MotorControllers.
-   *
-   * @tparam MotorControllers The MotorController types.
-   * @param motorController The first MotorController to add
-   * @param motorControllers The MotorControllers to add
-   */
-  template <class... MotorControllers>
-  explicit MotorControllerGroup(MotorController& motorController,
-                                MotorControllers&... motorControllers)
-      : m_motorControllers(std::vector<std::reference_wrapper<MotorController>>{
-            motorController, motorControllers...}) {
-    Initialize();
-  }
-
-  /**
-   * Create a new MotorControllerGroup with the provided MotorControllers.
-   *
-   * @param motorControllers The MotorControllers to add.
-   */
-  explicit MotorControllerGroup(
-      std::vector<std::reference_wrapper<MotorController>>&& motorControllers);
-
-  MotorControllerGroup(MotorControllerGroup&&) = default;
-  MotorControllerGroup& operator=(MotorControllerGroup&&) = default;
-
-  void Set(double speed) override;
-  void SetVoltage(wpi::units::volt_t output) override;
-  double Get() const override;
-  void SetInverted(bool isInverted) override;
-  bool GetInverted() const override;
-  void Disable() override;
-  void StopMotor() override;
-
-  void InitSendable(wpi::util::SendableBuilder& builder) override;
-
- private:
-  bool m_isInverted = false;
-  std::vector<std::reference_wrapper<MotorController>> m_motorControllers;
-
-  void Initialize();
-};
-
-}  // namespace wpi
-
-WPI_UNIGNORE_DEPRECATED