Remove unused settings.cpp/settings.hpp

These two files are no longer used now that netipmid is just a bridge
to send commands onto ipmid. This removes them.

Tested: Compile and run netipmid. Because they are unused, behavior is
        unchanged.

Change-Id: I24c9f30822050fc89028945b380fbc471a5c5b88
Signed-off-by: Vernon Mauery <vernon.mauery@linux.intel.com>
3 files changed