fix: remove unused file

Signed-off-by: Junjie Gao <[email protected]>

internal/osutil/file.go

@@ -16,7 +16,6 @@ package osutil
 import (
 	"crypto/sha256"
 	"encoding/hex"
-	"errors"
 	"fmt"
 	"io"
 	"io/fs"
@@ -61,17 +60,6 @@ func WriteFileWithPermission(path string, data []byte, perm fs.FileMode, overwri
 	return file.Close()
 }
 
-// RemoveIfExists removes a file if it exists.
-func RemoveIfExists(filepath string) error {
-	if _, err := os.Stat(filepath); err != nil {
-		if errors.Is(err, fs.ErrNotExist) {
-			return nil
-		}
-		return err
-	}
-	return os.Remove(filepath)
-}
-
 // CopyToDir copies the src file to dst. Existing file will be overwritten.
 func CopyToDir(src, dst string) (int64, error) {
 	sourceFileStat, err := os.Stat(src)

internal/osutil/file_test.go

@@ -15,8 +15,6 @@ package osutil
 
 import (
 	"bytes"
-	"errors"
-	"io/fs"
 	"os"
 	"path/filepath"
 	"runtime"
@@ -271,48 +269,3 @@ func TestValidateChecksum(t *testing.T) {
 		t.Fatalf("expected nil err, but got %v", err)
 	}
 }
-
-func TestRemoveIfExists(t *testing.T) {
-	t.Run("remove existing file", func(t *testing.T) {
-		tempDir := t.TempDir()
-		filename := filepath.Join(tempDir, "file.txt")
-		data := []byte("data")
-		if err := WriteFile(filename, data); err != nil {
-			t.Fatal(err)
-		}
-		if err := RemoveIfExists(filename); err != nil {
-			t.Fatal(err)
-		}
-		if _, err := os.Stat(filename); !errors.Is(err, fs.ErrNotExist) {
-			t.Fatal("file should be removed")
-		}
-	})
-
-	t.Run("remove non-existing file", func(t *testing.T) {
-		tempDir := t.TempDir()
-		filename := filepath.Join(tempDir, "file.txt")
-		if err := RemoveIfExists(filename); err != nil {
-			t.Fatal(err)
-		}
-	})
-
-	t.Run("remove file in directory without permission", func(t *testing.T) {
-		if runtime.GOOS == "windows" {
-			t.Skip("skipping test on Windows")
-		}
-		tempDir := t.TempDir()
-		filename := filepath.Join(tempDir, "file.txt")
-		data := []byte("data")
-		if err := WriteFile(filename, data); err != nil {
-			t.Fatal(err)
-		}
-		if err := os.Chmod(tempDir, 0000); err != nil {
-			t.Fatal(err)
-		}
-		defer os.Chmod(tempDir, 0700)
-
-		if err := RemoveIfExists(filename); err == nil {
-			t.Fatal("expected an error when removing file from restricted directory")
-		}
-	})
-}