The added by MDEV-11675 assert is incorrected assuming
a replayed from binlog transaction can't contain invoke
a FD event's apply method.

In fact it can do that through BINLOG event.
The test case like

  BEGIN;
    INSERT INTO t1 VALUES(10);
    BINLOG '
    SOgWTg8BAAAAbgAAAHIAAAAAAAQANS42LjMtbTUtZGVidWctbG9nAAAAAAAAAAAAAAAAAAAAAAAA
    AAAAAAAAAAAAAAAAAABI6BZOEzgNAAgAEgAEBAQEEgAAVgAEGggAAAAICAgCAAAAAAVAYI8=';

is provided (by yet to merged atm) MDEV-27536 fixes.

The assert is removed.