Further cleanup of lib/most-read

Authored by Mholloway on Mon, Dec 4, 11:58 PM.

Description

Further cleanup of lib/most-read

Note: This change removes the pageid field from the response items.
(Hence not marking this with Hygiene.) Is pageid actually used by clients?

Change-Id: I9d95e77330cfd3e65c8d456b1b69f2c60ed1cce8