diff --git a/internal/biz/timeslice/model.go b/internal/biz/timeslice/model.go
index 8e87526..65ef733 100644
--- a/internal/biz/timeslice/model.go
+++ b/internal/biz/timeslice/model.go
@@ -1,7 +1,6 @@
 package timeslice
 
 import (
-	"encoding/json"
 	"time"
 )
 
@@ -12,38 +11,14 @@ type Manager struct {
 	GoNum     int
 }
 
-func (t *Manager) String() (string, error) {
-	b, err := json.Marshal(t)
-	if err != nil {
-		return "", err
-	}
-	return string(b), nil
-}
-
 type Process struct {
 	manager   *Manager
 	taskCount int
 }
 
-func (t *Process) String() (string, error) {
-	b, err := json.Marshal(t)
-	if err != nil {
-		return "", err
-	}
-	return string(b), nil
-}
-
 type Task struct {
 	Process          *Process
 	CurrentStartTime time.Time
 	CurrentEndTime   time.Time
 	TaskID           int
 }
-
-func (t *Task) String() (string, error) {
-	b, err := json.Marshal(t)
-	if err != nil {
-		return "", err
-	}
-	return string(b), nil
-}