Readme: Remove remaining 4.x changelogs (#1369)

Helps with keeping the readme length at bay.

Author: obenland

readme.txt

@@ -197,94 +197,6 @@ For reasons of data protection, it is not possible to see the followers of other
 * Fixed: No longer parses tags for post types that don't support Activitypub.
 * Fixed: rel attribute will now contain no more than one "me" value.
 
-= 4.7.3 =
-
-* Fixed: Flush rewrite rules after NodeInfo update.
-
-= 4.7.2 =
-
-* Added: Support for WPML post locale
-* Removed: Built-in support for nodeinfo2. Use the [NodeInfo plugin](https://wordpress.org/plugins/nodeinfo/) instead.
-* Fixed: More robust handling of `_activityPubOptions` in scripts, using a `useOptions()` helper.
-* Fixed: Flush post caches after Followers migration.
-
-= 4.7.1 =
-
-* Fixed: Missing migration
-
-= 4.7.0 =
-
-* Added: Comment counts get updated when the plugin is activated/deactivated/deleted
-* Added: A filter to make custom comment types manageable in WP.com Calypso
-* Changed: Hide ActivityPub post meta keys from the custom Fields UI
-* Changed: Bumped minimum required PHP version to 7.2
-* Changed: Print `_activityPubOptions` in the `wp_footer` action on the frontend.
-* Fixed: Undefined array key warnings in various places
-* Fixed: @-mentions in federated comments being displayed with a line break
-* Fixed: Fetching replies from the same instance for Enable Mastodon Apps
-* Fixed: Image captions not being included in the ActivityPub representation when the image is attached to the post
-
-= 4.6.0 =
-
-* Added: A filter to allow modifying the ActivityPub preview template
-* Added: `@mentions` in the JSON representation of the reply
-* Added: Settings to enable/disable e-mail notifications for new followers and direct messages
-* Changed: HTML to e-mail text conversion
-* Changed: Direct Messages: Test for the user being in the to field
-* Changed: Better support for FSE color schemes
-* Fixed: Reactions: Provide a fallback for empty avatar URLs
-
-= 4.5.1 =
-
-* Changed: Reactions block: Remove the `wp-block-editor` dependency for frontend views
-* Fixed: Direct Messages: Don't send notification for received public activities
-
-= 4.5.0 =
-
-* Changed: Reactions (likes and reposts) now enabled by default
-* Added: Reactions block to display likes and reposts
-* Added: `icon` support for `Audio` and `Video` attachments
-* Added: Send "new follower" emails
-* Added: Send "direct message" emails
-* Added: Account for custom comment types when calculating comment counts
-* Added: Plugin upgrade routine that automatically updates comment counts
-* Changed: Email templates for Likes and Reposts
-* Changed: Interactions moderation
-* Changed: Compatibility with Akismet
-* Changed: Comment type mapping for `Like` and `Announce`
-* Changed: Signature verification for API endpoints
-* Changed: Changed priority of Attachments, to favor `Image` over `Audio` and `Video`
-* Fixed: Empty `url` attributes in the Reply block no longer cause PHP warnings
-
-= 4.4.0 =
-
-* Added: Setting to enable/disable Authorized-Fetch
-* Changed: Added screen reader text for the "Follow Me" block for improved accessibility
-* Changed: Added `media_type` support to Activity-Object-Transformers
-* Changed: Clarified settings page text around which users get Activitypub profiles
-* Changed: Add a filter to the REST API moderators list
-* Fixed: Prevent hex color codes in HTML attributes from being added as post tags
-* Fixed: A typo in the custom post content settings
-* Fixed: Prevent draft posts from being federated when bulk deleted
-
-= 4.3.0 =
-
-* Added: A `pre_activitypub_get_upload_baseurl` filter
-* Added: Fediverse Preview on post-overview page
-* Added: GitHub action to enforce Changelog updates
-* Added: New contributors
-* Changed: Basic enclosure validation
-* Changed: More User -> Actor renaming
-* Changed: Outsource Constants to a separate file
-* Changed: Better handling of `readme.txt` and `README.md`
-* Fixed: editor error when switching to edit a synced Pattern
-* Fixed: Fediverse preview showing `preferredUsername` instead of `name`
-* Fixed: Potential fatal error in Enable Mastodon Apps
-* Fixed: Broken escaping of Usernames in Actor-JSON
-* Fixed: Show Followers name instead of avatar on mobile view
-* Fixed: Missing attachement-type for enclosures
-* Fixed: Prevention against self pings
-
 See full Changelog on [GitHub](https://github.com/Automattic/wordpress-activitypub/blob/trunk/CHANGELOG.md).
 
 == Upgrade Notice ==