diff --git a/.deadcode-out b/.deadcode-out
index 9eb1748f84..40c1ec7e01 100644
--- a/.deadcode-out
+++ b/.deadcode-out
@@ -65,7 +65,6 @@ code.gitea.io/gitea/models/project
 	ChangeProjectStatus
 
 code.gitea.io/gitea/models/repo
-	DeleteAttachmentsByIssue
 	WatchRepoMode
 
 code.gitea.io/gitea/models/user
diff --git a/models/repo/attachment.go b/models/repo/attachment.go
index 128bcebb60..b95d785fa5 100644
--- a/models/repo/attachment.go
+++ b/models/repo/attachment.go
@@ -219,16 +219,6 @@ func DeleteAttachments(ctx context.Context, attachments []*Attachment, remove bo
 	return int(cnt), nil
 }
 
-// DeleteAttachmentsByIssue deletes all attachments associated with the given issue.
-func DeleteAttachmentsByIssue(ctx context.Context, issueID int64, remove bool) (int, error) {
-	attachments, err := GetAttachmentsByIssueID(ctx, issueID)
-	if err != nil {
-		return 0, err
-	}
-
-	return DeleteAttachments(ctx, attachments, remove)
-}
-
 // DeleteAttachmentsByComment deletes all attachments associated with the given comment.
 func DeleteAttachmentsByComment(ctx context.Context, commentID int64, remove bool) (int, error) {
 	attachments, err := GetAttachmentsByCommentID(ctx, commentID)
diff --git a/models/repo/attachment_test.go b/models/repo/attachment_test.go
index 23945ba1d3..881a40c3e7 100644
--- a/models/repo/attachment_test.go
+++ b/models/repo/attachment_test.go
@@ -46,11 +46,7 @@ func TestGetByCommentOrIssueID(t *testing.T) {
 func TestDeleteAttachments(t *testing.T) {
 	require.NoError(t, unittest.PrepareTestDatabase())
 
-	count, err := repo_model.DeleteAttachmentsByIssue(db.DefaultContext, 4, false)
-	require.NoError(t, err)
-	assert.Equal(t, 2, count)
-
-	count, err = repo_model.DeleteAttachmentsByComment(db.DefaultContext, 2, false)
+	count, err := repo_model.DeleteAttachmentsByComment(db.DefaultContext, 2, false)
 	require.NoError(t, err)
 	assert.Equal(t, 2, count)