diff --git a/internal/apps/file_others.go b/internal/apps/file_others.go
deleted file mode 100644
index 73bf2fe..0000000
--- a/internal/apps/file_others.go
+++ /dev/null
@@ -1,17 +0,0 @@
-// +build !windows
-
-package apps
-
-import (
-	"os"
-	"syscall"
-)
-
-// lock file
-func LockFile(fp *os.File) error {
-	return syscall.Flock(int(fp.Fd()), syscall.LOCK_EX|syscall.LOCK_NB)
-}
-
-func UnlockFile(fp *os.File) error {
-	return syscall.Flock(int(fp.Fd()), syscall.LOCK_UN)
-}