tests/Properties: remove unneeded newtypes.
tests/Properties: remove unneeded newtypes.

Ignore-this: d7bf6c1dde45641b42365420ffac36c0

darcs-hash:20090324065042-87dc9-be45dbe6211f23575caaf846d1f199a876a819db.gz

beni55/libmpd-haskell,sol/libmpd-haskell