Remove old unnecessary file

pkg/core/probe.go

@@ -1,31 +0,0 @@
-package core
-
-import "time"
-
-type Probe struct {
-	deadline time.Time
-	items    map[any]struct{}
-}
-
-func NewProbe(enable bool) *Probe {
-	if enable {
-		return &Probe{
-			deadline: time.Now().Add(time.Second * 3),
-			items:    map[any]struct{}{},
-		}
-	} else {
-		return nil
-	}
-}
-
-// Active return true if probe enabled and not finish
-func (p *Probe) Active() bool {
-	return len(p.items) < 2 && time.Now().Before(p.deadline)
-}
-
-// Append safe to run if Probe is nil
-func (p *Probe) Append(v any) {
-	if p != nil {
-		p.items[v] = struct{}{}
-	}
-}