Revert "namespace: add source file location exceptions"

This reverts commit 24a54f7974a616385b96cd939e004592e2cea484.

Stephen Hemminger <shemminger@vyatta.com> writes:
> That patch should not be included. It causes more problems than it
> solves, since then there are duplicate file locations which causes
> false duplicate symbol reports.

Reported-by: Stephen Hemminger <shemminger@vyatta.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>