[wpimath] Remove PathWeaver support (#7813)

Also rename file load type in glass to "Field Image JSON".

wpimath/src/main/native/include/frc/trajectory/TrajectoryUtil.h

@@ -1,61 +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 <string>
-#include <string_view>
-
-#include <wpi/SymbolExports.h>
-
-#include "frc/trajectory/Trajectory.h"
-
-namespace frc {
-/**
- * Trajectory utilities.
- */
-class WPILIB_DLLEXPORT TrajectoryUtil {
- public:
-  TrajectoryUtil() = delete;
-
-  /**
-   * Exports a Trajectory to a PathWeaver-style JSON file.
-   *
-   * @param trajectory the trajectory to export
-   * @param path the path of the file to export to
-   */
-  static void ToPathweaverJson(const Trajectory& trajectory,
-                               std::string_view path);
-  /**
-   * Imports a Trajectory from a JSON file exported from PathWeaver.
-   *
-   * @param path The path of the json file to import from.
-   *
-   * @return The trajectory represented by the file.
-   */
-  static Trajectory FromPathweaverJson(std::string_view path);
-
-  /**
-   * Deserializes a Trajectory from JSON exported from PathWeaver.
-   *
-   * @param trajectory the trajectory to export
-   *
-   * @return the string containing the serialized JSON
-   */
-  static std::string SerializeTrajectory(const Trajectory& trajectory);
-
-  /**
-   * Serializes a Trajectory to PathWeaver-style JSON.
-   *
-   * @param jsonStr the string containing the serialized JSON
-   *
-   * @return the trajectory represented by the JSON
-   */
-  static Trajectory DeserializeTrajectory(std::string_view jsonStr);
-
- private:
-  // Usage reporting for PathWeaver Trajectory instances
-  inline static int pathWeaverTrajectoryInstances = 0;
-};
-}  // namespace frc