Since Ubuntu 13.10, there’s an indicator applet on top panel which allows to quickly switch between keyboard layouts for various languages.
If you find that the keyboard indicator is useless, you can easily remove the applet from top panel by following the steps below:
1. Open System Settings from Unity Launcher or from top-right corner shutdown menu. Then click on Text Entry
2. In the bottom of the window you’ll see “Show current input source in the menu bar” which is enabled by default. Uncheck the box and the indicator applet will disappear instantly.
That’s it. Enjoy!