Remove unnecessary reboot delay

This is unnecessary as TFTP works fine without it.  Furthermore, it
intermittently results in stack overflow, preventing proper reboot.

main/ota.cpp

@@ -4,32 +4,11 @@ static const char *TAG = "ota";
 #include <esp_ota_ops.h>
 #include <lwip/apps/tftp_server.h>
 
-#include <freertos/FreeRTOS.h>
-#include <freertos/task.h>
-
 #include <cstring>
 
 #include "ota.hpp"
 
 
-// TODO: Stick this somewhere useful?
-static void reboot_soon_task(void*) {
-    int delay_s = 1;
-    ESP_LOGI(TAG, "Rebooting in %d second%s",
-        delay_s, delay_s == 1 ? "" : "s");
-    vTaskDelay(pdMS_TO_TICKS(delay_s * 1000));
-    esp_restart();
-}
-
-static void reboot_soon() {
-    xTaskCreate(
-            reboot_soon_task, "reboot_task",
-            configMINIMAL_STACK_SIZE * 2, // TODO: Choose the best size
-            NULL, 1, NULL
-        );
-}
-
-
 class OTA_Session {
 public:
     OTA_Session() :
@@ -74,7 +53,7 @@ public:
 
         ESP_LOGI(TAG, "OTA Successful");
 
-        reboot_soon();
+        esp_restart();
     }
 
     bool write(const void *data, int len) {