diff --git a/readthedocs/misc/v2-migration-guide.rst b/readthedocs/misc/v2-migration-guide.rst
index 51f161b5..514aa8b8 100644
--- a/readthedocs/misc/v2-migration-guide.rst
+++ b/readthedocs/misc/v2-migration-guide.rst
@@ -195,6 +195,19 @@ Additionally, the ``custom.File.id`` property is gone (which used to provide acc
 // this should lessen the impact of the removal of this feature
 
 
+Removal of several utility methods
+----------------------------------
+
+The following ``utils`` methods no longer exist or have been made private:
+
+* ``utils.resolve_bot_file_id``. It was half-broken.
+* ``utils.pack_bot_file_id``. It was half-broken.
+* ``utils.resolve_invite_link``. It has been broken for a while, so this just makes its removal
+  official (see `issue #1723 <https://github.com/LonamiWebs/Telethon/issues/1723>`__).
+
+// TODO provide the new clean utils
+
+
 The custom.Message class and the way it is used has changed
 -----------------------------------------------------------
 
diff --git a/telethon/_misc/utils.py b/telethon/_misc/utils.py
index 8f4667b8..a92aff0b 100644
--- a/telethon/_misc/utils.py
+++ b/telethon/_misc/utils.py
@@ -1115,43 +1115,6 @@ def _encode_telegram_base64(string):
         return None  # not valid base64, not valid ascii, not a string
 
 
-def resolve_invite_link(link):
-    """
-    Resolves the given invite link. Returns a tuple of
-    ``(link creator user id, global chat id, random int)``.
-
-    Note that for broadcast channels or with the newest link format, the link
-    creator user ID will be zero to protect their identity. Normal chats and
-    megagroup channels will have such ID.
-
-    Note that the chat ID may not be accurate for chats with a link that were
-    upgraded to megagroup, since the link can remain the same, but the chat
-    ID will be correct once a new link is generated.
-    """
-    link_hash, is_link = parse_username(link)
-    if not is_link:
-        # Perhaps the user passed the link hash directly
-        link_hash = link
-
-    # Little known fact, but invite links with a
-    # hex-string of bytes instead of base64 also works.
-    if re.match(r'[a-fA-F\d]+', link_hash) and len(link_hash) in (24, 32):
-        payload = bytes.fromhex(link_hash)
-    else:
-        payload = _decode_telegram_base64(link_hash)
-
-    try:
-        if len(payload) == 12:
-            return (0, *struct.unpack('>LQ', payload))
-        elif len(payload) == 16:
-            return struct.unpack('>LLQ', payload)
-        else:
-            pass
-    except (struct.error, TypeError):
-        pass
-    return None, None, None
-
-
 def resolve_inline_message_id(inline_msg_id):
     """
     Resolves an inline message ID. Returns a tuple of
diff --git a/telethon/sessions/memory.py b/telethon/sessions/memory.py
index 82067101..d3d6e22a 100644
--- a/telethon/sessions/memory.py
+++ b/telethon/sessions/memory.py
@@ -204,10 +204,6 @@ class MemorySession(Session):
                 username, invite = utils.parse_username(key)
                 if username and not invite:
                     result = self.get_entity_rows_by_username(username)
-                else:
-                    tup = utils.resolve_invite_link(key)[1]
-                    if tup:
-                        result = self.get_entity_rows_by_id(tup, exact=False)
 
         elif isinstance(key, int):
             result = self.get_entity_rows_by_id(key, exact)