localrepo: remove unneeded unpacking of r
This unpacking is unneeded now because previous patches have removed the need
for this method to modify each of these variables in favor of passing the whole
set around to pre/post hook methods of the corresponding context object.
http://mercurial.selenic.com/bts/issue1089
$ hg init
$ mkdir a
$ echo a > a/b
$ hg ci -Am m
adding a/b
$ hg rm a
removing a/b (glob)
$ hg ci -m m a
$ mkdir a b
$ echo a > a/b
$ hg ci -Am m
adding a/b
$ hg rm a
removing a/b (glob)
$ cd b
Relative delete:
$ hg ci -m m ../a
$ cd ..