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/commands/SetWristSetpoint.h

@@ -1,25 +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/commands/Command.h>
-
-/**
- * Move the wrist to a given angle. This command finishes when it is within
- * the tolerance, but leaves the PID loop running to maintain the position.
- * Other commands using the wrist should make sure they disable PID!
- */
-class SetWristSetpoint : public frc::Command {
- public:
-  explicit SetWristSetpoint(double setpoint);
-  void Initialize() override;
-  bool IsFinished() override;
-
- private:
-  double m_setpoint;
-};