Revert "MB-34675: Add logging for @ns_server auth failures"
Revert "MB-34675: Add logging for @ns_server auth failures"

The root cause of the bug was identified: a stale version of
isasl.pw was provided to memcached.

This reverts commit 99f00feb7fe3cbd79023089951f9863c062df9c3.

Change-Id: I991d0ad1d8fe6a89d67ebb5e495c6d13cab6102f
Reviewed-on: http://review.couchbase.org/111072
Tested-by: Build Bot <80754af91bfb6d1073585b046fe0a474ce868509@couchbase.com>
Reviewed-by: Dave Rigby <a09264da4832c7ff1d3bf1608a19f4b870f93750@couchbase.com>

daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine,daverigby/kv_engine