fix lint - ignore ok values as we know the stored value type

Signed-off-by: Kavindu Dodanduwa <kavindu.dodanduwa@elastic.co>

x-pack/filebeat/input/awss3/metrics.go

@@ -36,7 +36,7 @@ func init() {
 // currentTime returns the current time. This exists to allow unit tests
 // simulate the passage of time.
 func currentTime() time.Time {
-	clock := clockValue.Load().(clock)
+	clock, _ := clockValue.Load().(clock)
 	return clock.Now()
 }