rm empty statement


git-svn-id: https://svn.r-project.org/R/trunk@66700 00db46b3-68df-0310-9c12-caf00c1e9a41
\link{} "back" to update_pkg_po()

git-svn-id: https://svn.r-project.org/R/trunk@66701 00db46b3-68df-0310-9c12-caf00c1e9a41