fix(helm): add 'helm repo rm' alias

cmd/helm/repo.go

@@ -40,6 +40,7 @@ var repoListCmd = &cobra.Command{
 
 var repoRemoveCmd = &cobra.Command{
 	Use:     "remove [flags] [NAME]",
+	Aliases: []string{"rm"},
 	Short:   "remove a chart repository",
 	RunE:    runRepoRemove,
 }