Revert "net: add DEV_STATS_READ() helper"

This reverts commit 1d5224e0 which is
commit 0b068c714ca9479d2783cc333fff5bc2d4a6d45c upstream.

It breaks the Android ABI so it should be reverted for now.  If it needs
to come back later, it can do so in an ABI-safe way.

Bug: 161946584
Change-Id: I0c46ebd971d3a4511b4a291abe44b5b79c5700fc
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>