Removed linkage with undocumented function CPSEnableForegroundOperation() used to support
Mac OS 10.2 or below. This made no sense because the Copy/Paste implementation requires Mac OS 10.3.

git-svn-id: http://seriss.com/public/fltk/fltk/branches/branch-1.3@9964 ea41ed52-d2ee-0310-a9c1-e6b18d33e121