xfce/critical: fixed so that PRUNE_CRITICAL works

xfce/critical

@@ -1,10 +1,8 @@
 app-editors/nano
-net-misc/openssh
 net-misc/rsync
 net-misc/wget
 sys-kernel/gentoo-sources
 sys-kernel/linux-headers
-sys-devel/gcc
 sys-devel/automake
 sys-devel/bison
 sys-devel/make
@@ -30,7 +28,6 @@ sys-apps/busybox
 sys-apps/debianutils
 sys-apps/man-pages-posix
 sys-apps/sandbox
-sys-apps/which
 dev-lang/perl
 sys-devel/libperl
 sys-apps/portage