diff --git a/synapse/storage/group_server.py b/synapse/storage/group_server.py
index b328ef8bc..2e05c23fd 100644
--- a/synapse/storage/group_server.py
+++ b/synapse/storage/group_server.py
@@ -755,103 +755,6 @@ class GroupServerStore(SQLBaseStore):
             desc="add_room_to_group",
         )
 
-    @defer.inlineCallbacks
-    def register_user_group_membership(self, group_id, user_id, membership,
-                                       is_admin=False, content={},
-                                       local_attestation=None,
-                                       remote_attestation=None,
-                                       ):
-        def _register_user_group_membership_txn(txn, next_id):
-            # TODO: Upsert?
-            self._simple_delete_txn(
-                txn,
-                table="local_group_membership",
-                keyvalues={
-                    "group_id": group_id,
-                    "user_id": user_id,
-                },
-            )
-            self._simple_insert_txn(
-                txn,
-                table="local_group_membership",
-                values={
-                    "group_id": group_id,
-                    "user_id": user_id,
-                    "is_admin": is_admin,
-                    "membership": membership,
-                    "content": json.dumps(content),
-                },
-            )
-            self._simple_delete_txn(
-                txn,
-                table="local_group_updates",
-                keyvalues={
-                    "group_id": group_id,
-                    "user_id": user_id,
-                    "type": "membership",
-                },
-            )
-            self._simple_insert_txn(
-                txn,
-                table="local_group_updates",
-                values={
-                    "stream_id": next_id,
-                    "group_id": group_id,
-                    "user_id": user_id,
-                    "type": "membership",
-                    "content": json.dumps({"membership": membership, "content": content}),
-                }
-            )
-            self._group_updates_stream_cache.entity_has_changed(user_id, next_id)
-
-            # TODO: Insert profile to ensuer it comes down stream if its a join.
-
-            if membership == "join":
-                if local_attestation:
-                    self._simple_insert_txn(
-                        txn,
-                        table="group_attestations_renewals",
-                        values={
-                            "group_id": group_id,
-                            "user_id": user_id,
-                            "valid_until_ms": local_attestation["valid_until_ms"],
-                        }
-                    )
-                if remote_attestation:
-                    self._simple_insert_txn(
-                        txn,
-                        table="group_attestations_remote",
-                        values={
-                            "group_id": group_id,
-                            "user_id": user_id,
-                            "valid_until_ms": remote_attestation["valid_until_ms"],
-                            "attestation": json.dumps(remote_attestation),
-                        }
-                    )
-            else:
-                self._simple_delete_txn(
-                    txn,
-                    table="group_attestations_renewals",
-                    keyvalues={
-                        "group_id": group_id,
-                        "user_id": user_id,
-                    },
-                )
-                self._simple_delete_txn(
-                    txn,
-                    table="group_attestations_remote",
-                    keyvalues={
-                        "group_id": group_id,
-                        "user_id": user_id,
-                    },
-                )
-
-        with self._group_updates_id_gen.get_next() as next_id:
-            yield self.runInteraction(
-                "register_user_group_membership",
-                _register_user_group_membership_txn, next_id,
-            )
-
     @defer.inlineCallbacks
     def create_group(self, group_id, user_id, name, avatar_url, short_description,
                      long_description,):
@@ -867,61 +770,6 @@ class GroupServerStore(SQLBaseStore):
             desc="create_group",
         )
 
-    def get_joined_groups(self, user_id):
-        return self._simple_select_onecol(
-            table="local_group_membership",
-            keyvalues={
-                "user_id": user_id,
-                "membership": "join",
-            },
-            retcol="group_id",
-            desc="get_joined_groups",
-        )
-
-    def get_all_groups_for_user(self, user_id, now_token):
-        def _get_all_groups_for_user_txn(txn):
-            sql = """
-                SELECT group_id, type, membership, u.content
-                FROM local_group_updates AS u
-                INNER JOIN local_group_membership USING (group_id, user_id)
-                WHERE user_id = ? AND membership != 'leave'
-                    AND stream_id <= ?
-            """
-            txn.execute(sql, (user_id, now_token,))
-            return self.cursor_to_dict(txn)
-        return self.runInteraction(
-            "get_all_groups_for_user", _get_all_groups_for_user_txn,
-        )
-
-    def get_groups_changes_for_user(self, user_id, from_token, to_token):
-        from_token = int(from_token)
-        has_changed = self._group_updates_stream_cache.has_entity_changed(
-            user_id, from_token,
-        )
-        if not has_changed:
-            return []
-
-        def _get_groups_changes_for_user_txn(txn):
-            sql = """
-                SELECT group_id, membership, type, u.content
-                FROM local_group_updates AS u
-                INNER JOIN local_group_membership USING (group_id, user_id)
-                WHERE user_id = ? AND ? < stream_id AND stream_id <= ?
-            """
-            txn.execute(sql, (user_id, from_token, to_token,))
-            return [{
-                "group_id": group_id,
-                "membership": membership,
-                "type": gtype,
-                "content": json.loads(content_json),
-            } for group_id, membership, gtype, content_json in txn]
-        return self.runInteraction(
-            "get_groups_changes_for_user", _get_groups_changes_for_user_txn,
-        )
-
-    def get_group_stream_token(self):
-        return self._group_updates_id_gen.get_current_token()
-
     def get_attestations_need_renewals(self, valid_until_ms):
         """Get all attestations that need to be renewed until givent time
         """