Deduplicate module listings in devref

devref already contains a list of all modules, so no need to explicitly
include files that just contain lists of modules under the section 'Module
Reference'. Most of the deleted files are very outdated and refer to
non-existent modules anyway.

Leave services for now as it contains some content
that should be preserved. A later patch will clean those files up.

Change-Id: I5dce1b523f3648667fcde49ee51206ae9ccfdec8
Merge "Deduplicate module listings in devref"