diff --git a/telethon/client/messages.py b/telethon/client/messages.py
index 9c535fe7..0e4648e2 100644
--- a/telethon/client/messages.py
+++ b/telethon/client/messages.py
@@ -271,13 +271,6 @@ class MessageMethods(UploadMethods, MessageParseMethods):
 
         return msgs
 
-    async def get_message_history(self, *args, **kwargs):
-        """Deprecated, see :meth:`get_messages`."""
-        warnings.warn(
-            'get_message_history is deprecated, use get_messages instead'
-        )
-        return await self.get_messages(*args, **kwargs)
-
     # endregion
 
     # region Message sending/editing/deleting
diff --git a/telethon/client/telegrambaseclient.py b/telethon/client/telegrambaseclient.py
index 783349b2..bb584342 100644
--- a/telethon/client/telegrambaseclient.py
+++ b/telethon/client/telegrambaseclient.py
@@ -423,11 +423,6 @@ class TelegramBaseClient(abc.ABC):
         """
         raise NotImplementedError
 
-    async def invoke(self, *args, **kwargs):
-        warnings.warn('client.invoke(...) is deprecated, '
-                      'use client(...) instead')
-        self(*args, **kwargs)
-
     @abc.abstractmethod
     def _handle_update(self, update):
         raise NotImplementedError
diff --git a/telethon/client/updates.py b/telethon/client/updates.py
index 0aeec894..d509abc4 100644
--- a/telethon/client/updates.py
+++ b/telethon/client/updates.py
@@ -114,22 +114,6 @@ class UpdateMethods(UserMethods):
         """
         return [(callback, event) for event, callback in self._event_builders]
 
-    def add_update_handler(self, handler):
-        """Deprecated, see :meth:`add_event_handler`."""
-        warnings.warn(
-            'add_update_handler is deprecated, use the @client.on syntax '
-            'or add_event_handler(callback, events.Raw) instead (see '
-            'https://telethon.rtfd.io/en/latest/extra/basic/working-'
-            'with-updates.html)'
-        )
-        return self.add_event_handler(handler, events.Raw)
-
-    def remove_update_handler(self, handler):
-        return self.remove_event_handler(handler)
-
-    def list_update_handlers(self):
-        return [callback for callback, _ in self.list_event_handlers()]
-
     async def catch_up(self):
         state = self.session.get_update_state(0)
         if not state or not state.pts:
diff --git a/telethon/client/uploads.py b/telethon/client/uploads.py
index 4c724f4e..61c4f22b 100644
--- a/telethon/client/uploads.py
+++ b/telethon/client/uploads.py
@@ -163,13 +163,6 @@ class UploadMethods(MessageParseMethods, UserMethods):
 
         return msg
 
-    async def send_voice_note(self, *args, **kwargs):
-        """Deprecated, see :meth:`send_file`."""
-        warnings.warn('send_voice_note is deprecated, use '
-                      'send_file(..., voice_note=True) instead')
-        kwargs['is_voice_note'] = True
-        return await self.send_file(*args, **kwargs)
-
     async def _send_album(self, entity, files, caption='',
                     progress_callback=None, reply_to=None,
                     parse_mode=utils.Default):
diff --git a/telethon/events/common.py b/telethon/events/common.py
index 612b3042..47235a9d 100644
--- a/telethon/events/common.py
+++ b/telethon/events/common.py
@@ -1,10 +1,8 @@
 import abc
-import itertools
 import warnings
 
 from .. import utils
-from ..errors import RPCError
-from ..tl import TLObject, types, functions
+from ..tl import TLObject, types
 
 
 async def _into_id_set(client, chats):
diff --git a/telethon/events/messageread.py b/telethon/events/messageread.py
index b154632e..8e634cee 100644
--- a/telethon/events/messageread.py
+++ b/telethon/events/messageread.py
@@ -1,6 +1,6 @@
 from .common import EventBuilder, EventCommon, name_inner_event
 from .. import utils
-from ..tl import types, functions
+from ..tl import types
 
 
 @name_inner_event