[hal, wpilib] Remove SPI support (#7678)

hal/src/test/native/cpp/mockdata/SPIDataTest.cpp

@@ -1,40 +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 <string>
-
-#include <gtest/gtest.h>
-
-#include "hal/SPI.h"
-#include "hal/simulation/SPIData.h"
-
-namespace hal {
-
-std::string gTestSpiCallbackName;
-HAL_Value gTestSpiCallbackValue;
-
-void TestSpiInitializationCallback(const char* name, void* param,
-                                   const struct HAL_Value* value) {
-  gTestSpiCallbackName = name;
-  gTestSpiCallbackValue = *value;
-}
-
-TEST(SpiSimTest, SpiInitialization) {
-  const int INDEX_TO_TEST = 2;
-
-  int32_t status = 0;
-  HAL_SPIPort port;
-
-  int callbackParam = 0;
-  int callbackId = HALSIM_RegisterSPIInitializedCallback(
-      INDEX_TO_TEST, &TestSpiInitializationCallback, &callbackParam, false);
-  ASSERT_TRUE(0 != callbackId);
-
-  port = HAL_SPI_kOnboardCS2;
-  gTestSpiCallbackName = "Unset";
-  HAL_InitializeSPI(port, &status);
-  EXPECT_STREQ("Initialized", gTestSpiCallbackName.c_str());
-}
-
-}  // namespace hal