erase callbacks

src/slic3r/GUI/RemovableDriveManager.cpp

@@ -494,6 +494,10 @@ void RemovableDriveManager::add_callback(std::function<void()> callback)
 {
 	m_callbacks.push_back(callback);
 }
+void  RemovableDriveManager::erase_callbacks()
+{
+	m_callbacks.clear();
+}
 void RemovableDriveManager::set_last_save_path(const std::string& path)
 {
 	std::string last_drive = get_drive_from_path(path);

src/slic3r/GUI/RemovableDriveManager.hpp

@@ -31,6 +31,7 @@ public:
 	std::vector<DriveData> get_all_drives();
 	bool is_path_on_removable_drive(const std::string &path);
 	void add_callback(std::function<void()> callback); // callback will notify only if device with last save path was removed
+	void erase_callbacks(); // erases all callbacks added by add_callback()
 	void set_last_save_path(const std::string &path);
 	bool is_last_drive_removed(); //if we dont need info about this drive, call reset_last_save_path();
 	bool is_last_drive_removed_with_update(const long time = 0); // param as update()