diff --git a/.deadcode-out b/.deadcode-out
index 6c59cb031b..6043eb64ba 100644
--- a/.deadcode-out
+++ b/.deadcode-out
@@ -253,9 +253,6 @@ code.gitea.io/gitea/services/context
 code.gitea.io/gitea/services/convert
 	ToSecret
 
-code.gitea.io/gitea/services/forms
-	DeadlineForm.Validate
-
 code.gitea.io/gitea/services/pull
 	IsCommitStatusContextSuccess
 
diff --git a/services/forms/repo_form.go b/services/forms/repo_form.go
index 1ce9b298ad..8253a8957b 100644
--- a/services/forms/repo_form.go
+++ b/services/forms/repo_form.go
@@ -740,17 +740,6 @@ type SaveTopicForm struct {
 	Topics []string `binding:"topics;Required;"`
 }
 
-// DeadlineForm hold the validation rules for deadlines
-type DeadlineForm struct {
-	DateString string `form:"date" binding:"Required;Size(10)"`
-}
-
-// Validate validates the fields
-func (f *DeadlineForm) Validate(req *http.Request, errs binding.Errors) binding.Errors {
-	ctx := context.GetValidateContext(req)
-	return middleware.Validate(errs, ctx.Data, f, ctx.Locale)
-}
-
 type CommitNotesForm struct {
 	Notes string
 }