Remove unnecessary BC code for Message entity.

CHANGELOG.md

@@ -6,6 +6,7 @@ Exclamation symbols (:exclamation:) note something of importance e.g. breaking c
 ## [Unreleased]
 ### Added
 - Documents can be sent by providing its contents via Psr7 stream (as opposed to passing a file path).
+- First implementations towards Bots API 3.0.
 ### Changed
 ### Deprecated
 ### Removed

src/Entities/Message.php

@@ -79,8 +79,6 @@ class Message extends Entity
     /**
      * Message constructor
      *
-     * @todo: BC stuff should be removed at some point.
-     *
      * @param array  $data
      * @param string $bot_username
      *
@@ -88,20 +86,6 @@ class Message extends Entity
      */
     public function __construct(array $data, $bot_username = '')
     {
-        // Backwards-compatibility
-        if (isset($data['new_chat_participant'])) {
-            $data['new_chat_members'] = $data['new_chat_participant'];
-            unset($data['new_chat_participant']);
-        }
-        if (isset($data['new_chat_member'])) {
-            $data['new_chat_members'] = $data['new_chat_member'];
-            unset($data['new_chat_member']);
-        }
-        if (isset($data['left_chat_participant'])) {
-            $data['left_chat_member'] = $data['left_chat_participant'];
-            unset($data['left_chat_participant']);
-        }
-
         parent::__construct($data, $bot_username);
     }