Worker: fix "failed to retrieve Orchard's home directory path" (#309)

When running through launchd and no HOME is set.

internal/command/worker/worker.go

@@ -3,14 +3,9 @@
 package worker
 
 import (
-	"github.com/cirruslabs/orchard/internal/orchardhome"
 	"github.com/spf13/cobra"
-	"log"
-	"path/filepath"
 )
 
-var dataDirPath string
-
 func NewCommand() *cobra.Command {
 	command := &cobra.Command{
 		Use:   "worker",
@@ -19,13 +14,5 @@ func NewCommand() *cobra.Command {
 
 	command.AddCommand(newRunCommand())
 
-	orchardHome, err := orchardhome.Path()
-	if err != nil {
-		log.Fatal(err)
-	}
-
-	command.PersistentFlags().StringVar(&dataDirPath, "data-dir", filepath.Join(orchardHome, "worker"),
-		"path to the worker's data directory")
-
 	return command
 }