changed typo: uneeded to unneeded?

changed typo: uneeded to unneeded

hi sorry for that:English is not my first language.

I came across the clean.py and saw `uneeded` which I do not recall and my spellcheck also marks - I only know `unneeded`

https://github.com/subuser-security/subuser/blob/master/logic/subuserCommands/clean#L16

so I did some google search: `uneeded vs. unneeded`

Seems in  official dictionaries `unneeded`  but otherwise your version also comes up.

is this street language?  anyway if you want to change it to what spellchecks suggest: I did a patch otherwise just close it.