org-assert-version considered harmful

[Stefan Monnier]

I can see the reason for this macro, and I don't really have a better
solution to offer, but as someone who has a Git clone of Org that is
regularly updated&compiled using (basically) the normal compilation
system used in Emacs (i.e. not systematically recompiling all the files,
but only those whose `.el` is more recent than their `.elc`), it means
that whenever Org's version changes, I have to manually erase all the
`.elc` files otherwise this macro will (incorrectly)
complain everywhere  :-(


        Stefan