[FIX] point_of_sale: correctly delete sequences when uninstalling PoS

Current behavior:
After uninstalling the PoS module, if you try to install it again, you
get a traceback because Odoo is trying to create a sequence that already
exists.

Steps to reproduce:
- install PoS
- uninstall PoS
- install PoS
- you get a traceback

opw-3515647

closes odoo/odoo#139767

X-original-commit: c57bb574721a3610f66320dacdc703abc490d5d4
Signed-off-by: Vlad Stroia (vlst) <vlst@odoo.com>
Signed-off-by: Robin Engels (roen) <roen@odoo.com>

addons/point_of_sale/__init__.py

@@ -5,3 +5,10 @@ from . import models
 from . import controllers
 from . import report
 from . import wizard
+
+from odoo import api, SUPERUSER_ID
+
+def uninstall_hook(cr, registry):
+    env = api.Environment(cr, SUPERUSER_ID, {})
+    #The search domain is based on how the sequence is defined in the _get_sequence_values method in /addons/point_of_sale/models/stock_warehouse.py
+    env['ir.sequence'].search([('name', 'ilike', '%Picking POS%'), ('prefix', 'ilike', '%/POS/%')]).unlink()

addons/point_of_sale/__manifest__.py

@@ -8,6 +8,7 @@
     'sequence': 40,
     'summary': 'User-friendly PoS interface for shops and restaurants',
     'depends': ['stock_account', 'barcodes', 'web_editor', 'digest'],
+    'uninstall_hook': 'uninstall_hook',
     'data': [
         'security/point_of_sale_security.xml',
         'security/ir.model.access.csv',