btrfs: squash lines for simple wrapper functions

Remove unneeded variables and assignments.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index a87675f..bc7185c 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -4398,12 +4398,8 @@
 
 static int process_deleted_xattr(struct send_ctx *sctx)
 {
-	int ret;
-
-	ret = iterate_dir_item(sctx->parent_root, sctx->right_path,
-			       sctx->cmp_key, __process_deleted_xattr, sctx);
-
-	return ret;
+	return iterate_dir_item(sctx->parent_root, sctx->right_path,
+				sctx->cmp_key, __process_deleted_xattr, sctx);
 }
 
 struct find_xattr_ctx {