making unity dash filters stick
For 14.04: you can do this from the desktop.
Open dash --> Applications tab (on bottom of dash, second icon) --> Filter results --> Type --> Dash Plugins
Click on the plugin and select disable.
I learned this from: http://www.webupd8.org/2013/10/how-to-disable-amazon-shopping.html
You should be able to turn off Online Scopes in the Privacy Settings.
There is a list of the available scopes/lenses here, you should be able to remove them in software centre, or with sudo apt-get remove....