mlx90640: drop unused includes.

drivers/mlx90640/mlx90640.cpp

@@ -1,15 +1,8 @@
 #include <stdint.h>
-#include <iostream>
-#include <cstring>
-#include <fstream>
-#include <chrono>
-#include <thread>
-#include <math.h>
 #include "src/headers/MLX90640_API.h"
 #include "mlx90640.hpp"
 
 
-
 namespace pimoroni {
     MLX90640::MLX90640_Error MLX90640::setup(int fps){
         MLX90640_I2CConfigure(i2c_instance);