remove a wrong stray FREE_OBJ

this is a bad leftover from when we still used ALLOC_JOB/FREE_OBJ for
nodes and anyway we must not just free a node which is still linked in
an otherwise alive tree

src/vdp_pesi.c

@@ -561,8 +561,6 @@ pesi_buf_bytes(struct req *req, enum vdp_action act, void **priv,
 			VSLdbg(req, "bytes_add: exit after transient alloc "
 			       "failure");
 
-			FREE_OBJ(node);
-
 			Lck_Lock(&tree->tree_lock);
 			if (tree->retval == 0)
 				tree->retval = -1;