Delete legacy removal of `cartodb_id_#{oid}_seq`
Delete legacy removal of `cartodb_id_#{oid}_seq`

We no longer create a sequence with that convention and that was
modified a long time ago.

```
CREATE TABLE test();
SELECT cdb_cartodbfytable('test');

\d test
                                               Table "public.test"
        Column        |          Type           | Collation | Nullable |                 Default
----------------------+-------------------------+-----------+----------+------------------------------------------
 cartodb_id           | bigint                  |           | not null | nextval('test_cartodb_id_seq'::regclass)
 the_geom             | geometry(Geometry,4326) |           |          |
 the_geom_webmercator | geometry(Geometry,3857) |           |          |
Indexes:
    "test_pkey" PRIMARY KEY, btree (cartodb_id)
    "test_the_geom_idx" gist (the_geom)
    "test_the_geom_webmercator_idx" gist (the_geom_webmercator)
Triggers:
    test_quota BEFORE INSERT OR UPDATE ON test FOR EACH STATEMENT EXECUTE PROCEDURE cdb_checkquota('0.1', '-1', 'public')
    test_quota_per_row BEFORE INSERT OR UPDATE ON test FOR EACH ROW EXECUTE PROCEDURE cdb_checkquota('0.001', '-1', 'public')
    track_updates AFTER INSERT OR DELETE OR UPDATE OR TRUNCATE ON test FOR EACH STATEMENT EXECUTE PROCEDURE cdb_tablemetadata_trigger()
    update_the_geom_webmercator_trigger BEFORE INSERT OR UPDATE OF the_geom ON test FOR EACH ROW EXECUTE PROCEDURE _cdb_update_the_geom_webmercator()

\ds test_cartodb_id_seq
                 List of relations
 Schema |        Name         |   Type   |  Owner
--------+---------------------+----------+----------
 public | test_cartodb_id_seq | sequence | postgres
(1 row)
```

and since the sequence is owned by the table, deleting it will delete the sequence (as inteded):
```
DROP TABLE test;

\ds test_cartodb_id_seq
Did not find any relation named "test_cartodb_id_seq".
```

CartoDB/cartodb,CartoDB/cartodb,CartoDB/cartodb,CartoDB/cartodb,CartoDB/cartodb