add iot framework

main/boards/kevin-box-1/kevin_box_board.cc

@@ -122,18 +122,12 @@ public:
         boot_button_(BOOT_BUTTON_GPIO),
         volume_up_button_(VOLUME_UP_BUTTON_GPIO),
         volume_down_button_(VOLUME_DOWN_BUTTON_GPIO) {
-    }
-
-    virtual void Initialize() override {
-        ESP_LOGI(TAG, "Initializing KevinBoxBoard");
         InitializeDisplayI2c();
         InitializeCodecI2c();
         MountStorage();
         Enable4GModule();
 
         InitializeButtons();
-
-        Ml307Board::Initialize();
     }
 
     virtual Led* GetBuiltinLed() override {