patch applied (packages/mtl): Fix unused import warnings

[Ian Lynagh]

Tue Jul  7 06:36:43 PDT 2009  Ian Lynagh <igloo at earth.li>
  * Fix unused import warnings

    M ./Control/Monad/Error.hs -2 +1
    M ./Control/Monad/RWS/Lazy.hs -1 +1
    M ./Control/Monad/RWS/Strict.hs -1 +1

View patch online:
http://darcs.haskell.org/packages/mtl/_darcs/patches/20090707133643-3fd76-b15df3a67f91df8e4138c1918a8af1d72a5b2f23.gz