Remove untenable assertion from goals

Whether in civil rights, human rights, land rights, "intellectual
property" rights (as in this case) or any other rights, the act of
deciding who ought to be granted which rights in which circumstances is
not only inherently political, it is the very essence of politics.
Therefore, it is preposterous for choosealicense.com, if it is to be
meaningful, to aim to be "Politics Free".

This edit takes into account feedback from @tekkub on my initial pull
request.