Partially revert ".. actually make memcached log sweeping work"
Partially revert ".. actually make memcached log sweeping work"

This reverts commit 314b851b2bad39d965e478274a13a33fb6359589.

Dustin pointed out that we're using gen_server timeouts.

It's partial because I intend to leave initial cleanup message.

Change-Id: Ieea17d9092f1e589c6d8eb10636bd86169b2780c
Reviewed-on: http://review.couchbase.org/19958
Tested-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>
Reviewed-by: Dustin Sallings <1c08efb9b3965701be9d700d9a6f481f1ffec3ea@spy.net>
Reviewed-by: Aliaksey Kandratsenka <340b8e09ca65cd3fc686427fcfed17e87eaf61e2@gmail.com>

mschoch/ns_server,daverigby/ns_server,ceejatec/ns_server,vzasade/ns_server,mschoch/ns_server,membase/ns_server,membase/ns_server,vzasade/ns_server,membase/ns_server,ceejatec/ns_server,t3rm1n4l/ns_server,pavel-blagodov/ns_server,membase/ns_server,nimishzynga/ns_server,daverigby/ns_server,nimishzynga/ns_server,daverigby/ns_server,ceejatec/ns_server,t3rm1n4l/ns_server,nimishzynga/ns_server,ceejatec/ns_server,membase/ns_server,mschoch/ns_server,membase/ns_server,t3rm1n4l/ns_server,pavel-blagodov/ns_server,pavel-blagodov/ns_server,nimishzynga/ns_server,mschoch/ns_server,daverigby/ns_server,mschoch/ns_server,nimishzynga/ns_server,ceejatec/ns_server,nimishzynga/ns_server,t3rm1n4l/ns_server,daverigby/ns_server,ceejatec/ns_server,vzasade/ns_server,mschoch/ns_server,pavel-blagodov/ns_server,t3rm1n4l/ns_server,vzasade/ns_server