smartsnmpd: remove dysfunctional package

smartsnmpd: remove dysfunctional package

This package has been completely broken on several levels since
commit eadd5abe40a0 ("smartsnmpd: Update to 2015-02-22 version")

The update changed the configuration file syntax without fixing
the scripts generating this file.  The OpenWrt package would
therefore fail to run.

Worse than that, the last upstream version is completely broken
is unable to generate proper snmp replies even if the
configuration file is fixed, This has been tested and verified
on both OpenWrt/realtek and Debian/amd64.

I considered fixing the package, but dropped it for the following
reasons
 1) upstream has abandoned the project
 2) the upstream fork "smithsnmp" continues to make aribitrary
    changes to configuration files and other packaging challenges
 3) the package is tied to the lua5.1 C API, and further upgrades
    will be non-trivial
 4) there are several other snmp daemons available in OpenWrt,
    without any of these issues
 5) no one is interested in this package

The last point is proven by the lack of testing and feedback.
The last update was not even tested by the person preparing and
commiting the update.

Signed-off-by: Bjørn Mork <redacted>