[wpilib] Remove deprecated Sendable functions and SendableBase (#3210)

wpilibc/src/main/native/include/frc/smartdashboard/SendableBase.h

@@ -1,27 +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 <wpi/deprecated.h>
-
-#include "frc/smartdashboard/Sendable.h"
-#include "frc/smartdashboard/SendableHelper.h"
-
-namespace frc {
-
-class SendableBase : public Sendable, public SendableHelper<SendableBase> {
- public:
-  /**
-   * Creates an instance of the sensor base
-   *
-   * @deprecated use Sendable and SendableHelper
-   *
-   * @param addLiveWindow if true, add this Sendable to LiveWindow
-   */
-  WPI_DEPRECATED("use Sendable and SendableHelper")
-  explicit SendableBase(bool addLiveWindow = true);
-};
-
-}  // namespace frc