Replace deprecated API usage in C++ examples

Since there is a new version of GearsBot using the new command-based
API, the old GearsBot is just removed.

PR #1842 is being included to verify this PR is correct.

wpilibcExamples/src/main/cpp/examples/GearsBot/include/subsystems/Wrist.h

@@ -1,55 +0,0 @@
-/*----------------------------------------------------------------------------*/
-/* Copyright (c) 2017-2018 FIRST. All Rights Reserved.                        */
-/* Open Source Software - may be modified and shared by FRC teams. The code   */
-/* must be accompanied by the FIRST BSD license file in the root directory of */
-/* the project.                                                               */
-/*----------------------------------------------------------------------------*/
-
-#pragma once
-
-#include <frc/AnalogPotentiometer.h>
-#include <frc/PWMVictorSPX.h>
-#include <frc/commands/PIDSubsystem.h>
-
-/**
- * The wrist subsystem is like the elevator, but with a rotational joint instead
- * of a linear joint.
- */
-class Wrist : public frc::PIDSubsystem {
- public:
-  Wrist();
-
-  void InitDefaultCommand() override;
-
-  /**
-   * The log method puts interesting information to the SmartDashboard.
-   */
-  void Log();
-
-  /**
-   * Use the potentiometer as the PID sensor. This method is automatically
-   * called by the subsystem.
-   */
-  double ReturnPIDInput() override;
-
-  /**
-   * Use the motor as the PID output. This method is automatically called
-   * by
-   * the subsystem.
-   */
-  void UsePIDOutput(double d) override;
-
- private:
-  frc::PWMVictorSPX m_motor{6};
-
-// Conversion value of potentiometer varies between the real world and
-// simulation
-#ifndef SIMULATION
-  frc::AnalogPotentiometer m_pot{3, -270.0 / 5};
-#else
-  frc::AnalogPotentiometer m_pot{3};  // Defaults to degrees
-#endif
-
-  static constexpr double kP_real = 1;
-  static constexpr double kP_simulation = 0.05;
-};