Remove use of `seq` in pactree

This is not a bash builtin, so can potentially cause portability issues.
Additionally, the use of it is completely unnecessary as it can all be done
within bash (and done faster).

$ time pactree xfwm4 >/dev/null (old version)
real	0m3.245s

$ time ./contrib/pactree xfwm4 >/dev/null (new version)
real	0m3.042s

Signed-off-by: Dan McGee <dan@archlinux.org>

0 files changed, 0 insertions, 0 deletions