[hal, wpilib] Remove relay (#7695)

wpilibcExamples/src/main/cpp/examples/Relay/cpp/Robot.cpp

@@ -1,59 +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.
-
-#include <frc/Joystick.h>
-#include <frc/Relay.h>
-#include <frc/TimedRobot.h>
-
-/**
- * This is a sample program which uses joystick buttons to control a relay.
- *
- * A Relay (generally a spike) has two outputs, each of which can be at either
- * 0V or 12V and so can be used for actions such as turning a motor off, full
- * forwards, or full reverse, and is generally used on the compressor.
- *
- * This program uses two buttons on a joystick and each button corresponds to
- * one output; pressing the button sets the output to 12V and releasing sets it
- * to 0V.
- */
-class Robot : public frc::TimedRobot {
- public:
-  void TeleopPeriodic() override {
-    /* Retrieve the button values. GetRawButton() will return true if the button
-     * is pressed and false if not.
-     */
-    bool forward = m_stick.GetRawButton(kRelayForwardButton);
-    bool reverse = m_stick.GetRawButton(kRelayReverseButton);
-
-    /* Depending on the button values, we want to use one of kOn, kOff,
-     * kForward, or kReverse.
-     *
-     * kOn sets both outputs to 12V, kOff sets both to 0V.
-     * kForward sets forward to 12V and reverse to 0V.
-     * kReverse sets reverse to 12V and forward to 0V.
-     */
-    if (forward && reverse) {
-      m_relay.Set(frc::Relay::kOn);
-    } else if (forward) {
-      m_relay.Set(frc::Relay::kForward);
-    } else if (reverse) {
-      m_relay.Set(frc::Relay::kReverse);
-    } else {
-      m_relay.Set(frc::Relay::kOff);
-    }
-  }
-
- private:
-  frc::Joystick m_stick{0};
-  frc::Relay m_relay{0};
-
-  static constexpr int kRelayForwardButton = 1;
-  static constexpr int kRelayReverseButton = 2;
-};
-
-#ifndef RUNNING_FRC_TESTS
-int main() {
-  return frc::StartRobot<Robot>();
-}
-#endif

wpilibcExamples/src/main/cpp/examples/examples.json

@@ -12,18 +12,6 @@
     "gradlebase": "cpp",
     "commandversion": 2
   },
-  {
-    "name": "Relay",
-    "description": "Control a relay from joystick buttons.",
-    "tags": [
-      "Hardware",
-      "Relay",
-      "Joystick"
-    ],
-    "foldername": "Relay",
-    "gradlebase": "cpp",
-    "commandversion": 2
-  },
   {
     "name": "PDP CAN Monitoring",
     "description": "Monitor Power Distribution data such as voltage, current, temperature, etc.",