Remove Jetpack-only entry and WordPress-only label for WP 22.1 notes

Notice that the entry that was removed did not have the "Jetpack-only"
label but was still a Jetpack-only feature. I verified this by following
the instructions in
#20369
and not seeing the button to personalize the home screen. This is
consistent with only Jetpack offering a home screen that is enhanced
with cards.

WordPress/Resources/release_notes.txt

@@ -1,5 +1,3 @@
 * [**] [internal] Refactor updating account related Core Data operations, which ususally happens during log in and out of the app. [#20394]
 * [***] [internal] Refactor uploading photos (from the device photo, the Free Photo library, and other sources) to the WordPress Media Library. Affected areas are where you can choose a photo and upload, including the "Media" screen, adding images to a post, updating site icon, etc. [#20322]
-* [**] [WordPress-only] Warns user about sites with only individual plugins not supporting core app features and offers the option to switch to the Jetpack app. [#20408]
-* [**] Add a "Personalize Home Tab" button to the bottom of the Home tab that allows changing cards visibility. [#20369]
-
+* [**] Warns user about sites with only individual plugins not supporting core app features and offers the option to switch to the Jetpack app. [#20408]