Adjust raw Jetpack release notes for version 19.1

Author: mokagio

WordPress/Jetpack/Resources/release_notes.txt

@@ -1,6 +1,5 @@
 * [*] Signup: Fixed bug where username selection screen could be pushed twice. [#17624]
 * [**] Threaded comments: comments can now be moderated via a drop-down menu on each comment. [#17758]
-* [**] Reader post details Comments snippet: added ability to manage conversation subscription and notifications. [#17749]
 * [**] Accessibility: VoiceOver and Dynamic Type improvements on Activity Log and Schedule Post calendars [#17756, #17761, #17780]
 * [*] Weekly Roundup: Fix a crash which was preventing weekly roundup notifications from appearing [#17765]
 * [*] Self-hosted login: Improved error messages. [#17724]