[FIX] sql_db: remove unused __closer

The `__closer` attribute is filled with the origin of a call to
`cr.close()`. That information is reused in the `check` decotator that
ensure the user is not using a closed cursor. In case he is using a
closed cursor, an error is raised with that optional origin in case of
`--log-sql`.

The attribute is a dundler so it is only accessible within its class, as
the decorator has been moved outside of the class by 058cf208a8e7 it is
not directly accessible thus `__getattr__` is called as a fallback. The
`__getattr__` itself is protected by the `check` decorator thus they
call each other in a infinite recursion.

As the related dundler is no more used internally, it has been decided
to remove it entirely.

closes odoo/odoo#47616

Task: 2199895
X-original-commit: 3ebf7cb9cca37b05f44aaffc0b1f289cc65f300f
Signed-off-by: Julien Castiaux <Julien00859@users.noreply.github.com>

0 files changed, 0 insertions, 0 deletions