patch applied (packages/unix): Remove unused imports

[Ian Lynagh]

Tue Jul  7 04:59:00 PDT 2009  Ian Lynagh <igloo at earth.li>
  * Remove unused imports

    M ./System/Posix/Process.hsc -2
    M ./System/Posix/Semaphore.hsc -1
    M ./System/Posix/Signals.hsc -8 +1

View patch online:
http://darcs.haskell.org/packages/unix/_darcs/patches/20090707115900-3fd76-7dac8b082e3888f381236602d6b2f3b13f8796b8.gz