Remove pages from output

Pages seem to have been added into the output in the FreeNAS version of
the script. This patch removes pages from the output to more closely
resemble the freebsd version of the script.
Merge branch 'arc_summary_draft_v2' of https://github.com/p4tino/zfs into arc_summary_draft_v2

Conflicts:
	cmd/arc_summary/arc_summary.py