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/Robot.h

@@ -1,41 +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/TimedRobot.h>
-#include <frc/commands/Command.h>
-#include <frc/commands/Scheduler.h>
-#include <frc/livewindow/LiveWindow.h>
-#include <frc/smartdashboard/SmartDashboard.h>
-
-#include "OI.h"
-#include "commands/Autonomous.h"
-#include "subsystems/Claw.h"
-#include "subsystems/DriveTrain.h"
-#include "subsystems/Elevator.h"
-#include "subsystems/Wrist.h"
-
-class Robot : public frc::TimedRobot {
- public:
-  static DriveTrain drivetrain;
-  static Elevator elevator;
-  static Wrist wrist;
-  static Claw claw;
-  static OI oi;
-
- private:
-  Autonomous m_autonomousCommand;
-  frc::LiveWindow& m_lw = *frc::LiveWindow::GetInstance();
-
-  void RobotInit() override;
-  void AutonomousInit() override;
-  void AutonomousPeriodic() override;
-  void TeleopInit() override;
-  void TeleopPeriodic() override;
-  void TestPeriodic() override;
-};