[wpilib] Remove Potentiometer interface

wpilibc/src/main/native/include/frc/interfaces/Potentiometer.h

@@ -1,28 +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
-
-namespace frc {
-
-/**
- * Interface for potentiometers.
- */
-class Potentiometer {
- public:
-  Potentiometer() = default;
-  virtual ~Potentiometer() = default;
-
-  Potentiometer(Potentiometer&&) = default;
-  Potentiometer& operator=(Potentiometer&&) = default;
-
-  /**
-   * Common interface for getting the current value of a potentiometer.
-   *
-   * @return The current set speed. Value is between -1.0 and 1.0.
-   */
-  virtual double Get() const = 0;
-};
-
-}  // namespace frc