[aur-general] deletion request: seamonkey-nightly

(I'm guessing the first one didn't get through.) "seamonkey-nightly" package is succeeded by the nightly branch builds seamonkey-nightly-unstable (2.1b2pre branch) and seamonkey-nightly-stable (2.0.12pre branch). The former has the latest code base and is bleeding edge (trunk) while the latter is nevertheless a nightly build, but not bleeding edge. (I was confused at first about this...) ~