[clean] delete old test files

tests/__init__.py

-# License AGPL-3.0 or later (https://www.gnu.org/licenses/agpl).
-
-from . import test_connector_riga

tests/test_riga_import.py

-# © 2019 Le Filament (<http://www.le-filament.com>)
-# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
-
-import random
-import logging
-
-from odoo.tests import tagged, common
-
-_logger = logging.getLogger(__name__)
-
-
-@tagged('post_install', '-at_install')
-class TestApiRiga(common.TransactionCase):
-
-    def test_read(self):
-        print("---------- tests riga ----------------")
-        # riga = self.env['riga.api']
-        # print("______ Lecture ______")
-        # print(riga.read_organism(6481))
-
-        print("\n______ Queue ______\n")
-        queue = self.env['riga.job.queue']
-        queue.riga_sync()