change return value to void for sendMessageReadAck and remove Deprecated leaveOther.

Author: luckyyuqiang

im_flutter_sdk/lib/src/managers/chat_manager.dart

@@ -415,13 +415,12 @@ class EMChatManager {
   ///
   /// **Throws** 如果有异常会在这里抛出，包含错误码和错误描述，详见 [EMError]。
   /// ~end
-  Future<bool> sendMessageReadAck(EMMessage message) async {
+  Future<void> sendMessageReadAck(EMMessage message) async {
     try {
       Map req = {"to": message.from, "msgId": message.msgId};
       Map result = await Client.instance.chatManager
           .callNativeMethod(ChatMethodKeys.ackMessageRead, req);
       EMError.hasErrorFromResult(result);
-      return result.boolValue(ChatMethodKeys.ackMessageRead);
     } catch (e) {
       rethrow;
     }

im_flutter_sdk/lib/src/managers/chat_room_manager.dart

@@ -256,7 +256,6 @@ class EMChatRoomManager {
 
   Future<void> joinChatRoom(
     String roomId, {
-    @Deprecated('') bool? leaveOther,
     bool leaveOtherRooms = false,
     String? ext,
   }) async {