[hal, wpilib] Remove analog accumulator and analog gyro (#7697)

The 2 high level classes were temporarily kept to keep the examples compiling. We will remove those when we have the interface into the built in IMU.

hal/src/main/native/sim/Ports.cpp

@@ -13,9 +13,6 @@ void InitializePorts() {}
 }  // namespace hal::init
 
 extern "C" {
-int32_t HAL_GetNumAccumulators(void) {
-  return kNumAccumulators;
-}
 int32_t HAL_GetNumAnalogTriggers(void) {
   return kNumAnalogTriggers;
 }