remove unsed include spi.h

examples/FreeFallDetect/FreeFallDetect.ino

@@ -30,7 +30,6 @@
 
 #include "SparkFunLSM6DS3.h"
 #include "Wire.h"
-#include "SPI.h"
 
 #define CLEAR_STEP      true
 #define NOT_CLEAR_STEP  false 

examples/HighLevelExample/HighLevelExample.ino

@@ -30,7 +30,6 @@
 
 #include "SparkFunLSM6DS3.h"
 #include "Wire.h"
-#include "SPI.h"
 
 //Create a instance of class LSM6DS3
 LSM6DS3 myIMU( I2C_MODE, 0x6A );  //I2C device address 0x6A

examples/Pedometer/Pedometer.ino

@@ -30,7 +30,6 @@
 
 #include "SparkFunLSM6DS3.h"
 #include "Wire.h"
-#include "SPI.h"
 
 #define CLEAR_STEP      true
 #define NOT_CLEAR_STEP  false