How can I disable some lenses in the Dash menu?
There are several ways to do this, though one would think the easiest thing for ubuntu to do would be to have some easy to access configuration options from within the dash, but that's just crazy talk.
If you're confident using the terminal then I recommend option 2, because the behaviour of the software center will be misleading.
Option 1 - Use Ubuntu Software Center
Option 2 - Use the Terminal (Recommended)
What lenses do I recommend uninstalling?
All of them except for
Here's a small package I whipped up if you're comfortable with either setsid unity or logging out
I would imaging that the easiest way of doing this would be to uninstall it, logout and login. It would still be in the cache if you would like to install it again later on.
If you on the other hand do not want to uninstall it and want to just make it go away from the Dash you could just move it out of the
For example let us say you have install the Askubuntu Lense like me.
you would then have a folder inside
This would move the askubuntu lense from the lense folder to the parent folder. If you logout/login, the askubuntu lense will be gone.
UPDATE - As aking1012 points out, typing
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If you're using Ubuntu 13.04 or newer:
In the tweak tool you can use the search tab to modify the relevant settings: