Update TODO.md

Author: KnugiHK

TODO.md

@@ -7,6 +7,3 @@ This document describes what need to be changed or added due to the changes made
 ## Synapse
 ### 1.49.0
 1. Add admin API to get some information about federation status with remote servers. ([#11407](https://github.com/matrix-org/synapse/issues/11407)) -> Test delayed
-
-### 1.50.0
-1. Add admin API to get users' account data. ([#11664](https://github.com/matrix-org/synapse/issues/11664)) -> Test needed