gh-42: Fix snapshot_daemon test (osx, freebsd)

test/box/snapshot_daemon.result

@@ -108,10 +108,6 @@ box.cfg{snapshot_period = 3600 * 4, snapshot_count = 4 }
 space:drop()
 ---
 ...
-PERIOD
----
-- 0.03
-...
 box.cfg{ snapshot_count = .2 }
 ---
 - error: 'Incorrect value for option ''snapshot_count'': must be an integer'

test/box/snapshot_daemon.test.lua

@@ -68,8 +68,6 @@ fio.basename(snaps[1], '.snap') >= fio.basename(xlogs[1], '.xlog')
 box.cfg{snapshot_period = 3600 * 4, snapshot_count = 4 }
 space:drop()
 
-PERIOD
-
 box.cfg{ snapshot_count = .2 }
 
 daemon = box.internal.snapshot_daemon