openbsd' cp/mv dont support -n option

Index: src/core/fr-archive.c
--- src/core/fr-archive.c.orig
+++ src/core/fr-archive.c
@@ -2741,8 +2741,6 @@ move_files_to_dir (FrArchive  *archive,
 			fr_process_add_arg (archive->process, "-R");
 			if (overwrite)
 				fr_process_add_arg (archive->process, "-f");
-			else
-				fr_process_add_arg (archive->process, "-n");
 			if (filename[0] == '/')
 				fr_process_add_arg_concat (archive->process, source_dir, filename, NULL);
 			else
@@ -2768,8 +2766,6 @@ move_files_to_dir (FrArchive  *archive,
 	fr_process_begin_command (archive->process, "mv");
 	if (overwrite)
 		fr_process_add_arg (archive->process, "-f");
-	else
-		fr_process_add_arg (archive->process, "-n");
 	for (scan = list; scan; scan = scan->next) {
 		char *filename = scan->data;
 
