Remove unused file

Between the _windows file and _unix file being used by non-windows,
we catch all cases.

The _others file is probably a maintenance burden and every new OS
needs to be excluded from building it.

Signed-off-by: Maya Rashish <maya@NetBSD.org>

pkg/homedir/homedir_others.go

@@ -1,38 +0,0 @@
-//go:build !linux && !darwin && !freebsd && !windows
-// +build !linux,!darwin,!freebsd,!windows
-
-package homedir
-
-// Copyright 2013-2018 Docker, Inc.
-// NOTE: this package has originally been copied from github.com/docker/docker.
-
-import (
-	"errors"
-	"os"
-	"path/filepath"
-)
-
-// GetRuntimeDir is unsupported on non-linux system.
-func GetRuntimeDir() (string, error) {
-	return "", errors.New("homedir.GetRuntimeDir() is not supported on this system")
-}
-
-// StickRuntimeDirContents is unsupported on non-linux system.
-func StickRuntimeDirContents(files []string) ([]string, error) {
-	return nil, errors.New("homedir.StickRuntimeDirContents() is not supported on this system")
-}
-
-// GetConfigHome returns XDG_CONFIG_HOME.
-// GetConfigHome returns $HOME/.config and nil error if XDG_CONFIG_HOME is not set.
-//
-// See also https://standards.freedesktop.org/basedir-spec/latest/ar01s03.html
-func GetConfigHome() (string, error) {
-	if xdgConfigHome := os.Getenv("XDG_CONFIG_HOME"); xdgConfigHome != "" {
-		return xdgConfigHome, nil
-	}
-	home := Get()
-	if home == "" {
-		return "", errors.New("could not get either XDG_CONFIG_HOME or HOME")
-	}
-	return filepath.Join(home, ".config"), nil
-}