fs: clean up helper functions

internal/fs/file.go

@@ -3,7 +3,6 @@ package fs
 import (
 	"fmt"
 	"os"
-	"path/filepath"
 	"time"
 )
 
@@ -75,15 +74,6 @@ func Lstat(name string) (os.FileInfo, error) {
 	return os.Lstat(fixpath(name))
 }
 
-// Create creates the named file with mode 0666 (before umask), truncating
-// it if it already exists. If successful, methods on the returned
-// File can be used for I/O; the associated file descriptor has mode
-// O_RDWR.
-// If there is an error, it will be of type *PathError.
-func Create(name string) (*os.File, error) {
-	return os.Create(fixpath(name))
-}
-
 // Open opens a file for reading.
 func Open(name string) (File, error) {
 	return os.Open(fixpath(name))
@@ -98,16 +88,6 @@ func OpenFile(name string, flag int, perm os.FileMode) (*os.File, error) {
 	return os.OpenFile(fixpath(name), flag, perm)
 }
 
-// Walk walks the file tree rooted at root, calling walkFn for each file or
-// directory in the tree, including root. All errors that arise visiting files
-// and directories are filtered by walkFn. The files are walked in lexical
-// order, which makes the output deterministic but means that for very
-// large directories Walk can be inefficient.
-// Walk does not follow symbolic links.
-func Walk(root string, walkFn filepath.WalkFunc) error {
-	return filepath.Walk(fixpath(root), walkFn)
-}
-
 // RemoveIfExists removes a file, returning no error if it does not exist.
 func RemoveIfExists(filename string) error {
 	err := os.Remove(filename)

internal/fs/helpers.go

@@ -1,13 +0,0 @@
-package fs
-
-import "os"
-
-// IsRegularFile returns true if fi belongs to a normal file. If fi is nil,
-// false is returned.
-func IsRegularFile(fi os.FileInfo) bool {
-	if fi == nil {
-		return false
-	}
-
-	return fi.Mode()&os.ModeType == 0
-}