overlord/ifacestate: drop a log when no effects are scheduled (canonical#16785)

Drop a log which occasionally shows up in stderr.

Signed-off-by: Maciej Borzecki <maciej.borzecki@canonical.com>

Author: bboozzoo

overlord/ifacestate/handlers.go

@@ -2497,7 +2497,6 @@ func (m *InterfaceManager) doProcessDelayedSecurityBackendEffects(task *state.Ta
 	}
 
 	if len(delayed.TriggeringSnaps) == 0 {
-		task.Logf("no delayed backend effects")
 		return nil
 	}