What can I do for hiding a program icon from the notification bar and Unity Launcher?
You can hide icon of running program from Launcher using CompizConfig Settings Manager.
To install it run:
sudo apt-get install compizconfig-settings-manager
To launch run:
Then go to section Windows Management, enable Windows Rules. Then choose it, and add this line into "Skip Taskbar":
Replace nameofwindow with the title of the window you want to hide.
To remove an entry from the launcher, right-click on the icon and select "Unlock from Launcher". To remove items from notification bar, see handy tips from this post.