clean duplicate define-key at cider-sesman-browser-map

[conao3]

This keybind first introduced in the commit. There are two lines of key bindings to C-c C-q, probably due to a simple mistake.

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If you're just starting out to hack on CIDER you might find this section of its
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[conao3]

Or, just remove the line

[bbatsov]

I think it's better to just remove the duplication.

[conao3]

Thanks, @bbatsov!
I just remove duplicate one.

[bbatsov]

Thanks!