examples: remove nvs_flash_init from examples which do not use NVS

examples/get-started/blink/main/blink.c

@@ -9,8 +9,6 @@
 #include <stdio.h>
 #include "freertos/FreeRTOS.h"
 #include "freertos/task.h"
-#include "esp_system.h"
-#include "nvs_flash.h"
 #include "driver/gpio.h"
 #include "sdkconfig.h"
 
@@ -42,6 +40,5 @@ void blink_task(void *pvParameter)
 
 void app_main()
 {
-    nvs_flash_init();
     xTaskCreate(&blink_task, "blink_task", 512, NULL, 5, NULL);
 }