Safe removal question.

How safe is it to remove files from

/var/calculate/tmp/portage

calculate:ahutsona {23:36} /var/calculate/tmp/portage
─ % ls -lh
total 0
drwxrwxr-x 1 portage portage 20 Nov 21 08:10 app-editors
drwxrwxr-x 1 portage portage 96 Dec 7 18:37 app-misc
drwxrwxr-x 1 portage portage 38 Nov 30 04:22 app-office
drwxrwxr-x 1 portage portage 130 Dec 2 19:03 app-text
drwxrwxr-x 1 portage portage 42 Nov 18 20:10 dev-lang
drwxrwxr-x 1 portage portage 94 Dec 7 18:41 dev-libs
drwxrwxr-x 1 portage portage 24 Dec 2 19:03 dev-python
drwxrwxr-x 1 portage portage 96 Nov 30 18:56 dev-qt
drwxrwxr-x 1 portage portage 34 Dec 7 18:42 dev-util
drwxrwxr-x 1 portage portage 34 Nov 24 00:55 gnome-extra
drwxrwxr-x 1 portage portage 118 Nov 18 20:25 kde-base
drwxrwxr-x 1 portage portage 26 Nov 27 16:07 media-gfx
drwxrwxr-x 1 portage portage 156 Dec 6 12:35 media-libs
drwxrwxr-x 1 portage portage 64 Dec 6 19:26 media-sound
drwxrwxr-x 1 portage portage 46 Nov 9 07:44 media-tv
drwxrwxr-x 1 portage portage 90 Dec 5 15:55 net-libs
drwxrwxr-x 1 portage portage 42 Dec 6 12:12 net-misc
drwxrwxr-x 1 portage portage 38 Nov 20 20:20 net-print
drwxrwxr-x 1 portage portage 36 Nov 3 07:50 sci-mathematics
drwxrwxr-x 1 portage portage 36 Dec 7 18:47 sys-apps
drwxrwxr-x 1 portage portage 104 Dec 7 18:44 sys-devel
drwxrwxr-x 1 portage portage 46 Nov 23 19:23 sys-libs
drwxrwxr-x 1 portage portage 220 Dec 5 13:08 www-client
drwxrwxr-x 1 portage portage 32 Nov 30 18:52 x11-libs

I’m pretty sure its ok to get rid pf the things in /var/calculate/tmp/portage, I wanted to double check to see and there was a reason not to keep this directory clean.