[-] fix self-destruct interval chains, fixes #631 (#637)

Author: pashagolub

internal/scheduler/interval_chain.go

@@ -27,10 +27,6 @@ func (sch *Scheduler) isValid(ichain IntervalChain) bool {
 }
 
 func (sch *Scheduler) reschedule(ctx context.Context, ichain IntervalChain) {
-	if ichain.SelfDestruct {
-		sch.pgengine.DeleteChain(ctx, ichain.ChainID)
-		return
-	}
 	log.GetLogger(ctx).Debug("Sleeping before next execution of interval chain")
 	select {
 	case <-time.After(time.Duration(ichain.Interval) * time.Second):