fix(styling): Remove whitespace, unnecesary header and add comment

IMU/main/mpu6886.c

@@ -1,6 +1,4 @@
 #include "mpu6886.h"
-#include <string.h>
-
 
 #ifdef CONFIG_ENV_MQTT_ENABLED
 static void wifi_init()

IMU/main/mpu6886.h

@@ -14,7 +14,6 @@
 #include <string.h>
 #include <stdio.h>
 
-
 #define I2C_MASTER_SCL_IO           CONFIG_I2C_MASTER_SCL       /*!< GPIO number used for I2C master clock */
 #define I2C_MASTER_SDA_IO           CONFIG_I2C_MASTER_SDA       /*!< GPIO number used for I2C master data  */
 #define I2C_MASTER_NUM              I2C_NUM_0                   /*!< I2C port number for master dev */
@@ -50,7 +49,7 @@
 
 // Scale factors
 #define SF_M_S2 9.80665f
-#define SF_RAD_S 0.017453292519943f
+#define SF_RAD_S 0.017453292519943f // pi/180
 
 typedef struct {
     float x;