Simplified payload for elements

Change-Id: I84885635f82a82469df12b9b9bc3c4c0b7e32e1b
diff --git a/misc/payloads.md b/misc/payloads.md
index 652d1e7..8ee03fc 100644
--- a/misc/payloads.md
+++ b/misc/payloads.md
@@ -66,8 +66,7 @@
 
 *PTIs* (It’s an element payload if the second bit is set):
 64. Element (with optional TUI and certainty)
-65. Element with a parent reference (with optional TUI and certainty)
-66. Milestone
+65. Milestone (with optional TUI and certainty)
 
 ### Relation payloads
 Each relation are indexed with two instances for both directions.