[wpiutil] Remove unfinished ct_map class (#7406)

wpiutil/src/main/native/include/wpi/ct_map.h

@@ -1,35 +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 <algorithm>
-#include <array>
-#include <cstddef>
-#include <stdexcept>
-#include <utility>
-
-namespace wpi {
-
-template <typename Key, typename Value, size_t Size>
-class ct_map {
-  constexpr ct_map();
-
-  [[nodiscard]]
-  constexpr const Value& operator[](const Key& key) const {
-    if (const auto it =
-            std::find_if(data.begin(), data.end(),
-                         [&key](const auto& v) { return v.first == key; });
-        it != data.end()) {
-      return it->second;
-    } else {
-      throw std::range_error("Not found");
-    }
-  }
-
- private:
-  std::array<std::pair<Key, Value>, Size> data;
-};
-
-}  // namespace wpi