After upgrading from Ubuntu 13 -> 14.04 emacs now wastes valuable screen space with silly buttons. How can I go back to a "buttonless" version of emacs?

After upgrading from Ubuntu 13 -> 14.04 emacs now wastes valuable screen space with silly buttons. How can I go back to a "buttonless" version of emacs?

Edit your ~/.emacs or our ~/.emacs.d/init.el file and add this line
(tool-bar-mode 0)
This will prevent the toolbar for showing again.