env.cr.execute('''ALTER TABLE product_template DROP COLUMN IF EXISTS l10n_mx_edi_tariff_fraction_id;''')
env.cr.execute('''DROP TABLE IF EXISTS l10n_mx_edi_tariff_fraction''')
env.cr.execute('''ALTER TABLE res_company DROP COLUMN IF EXISTS l10n_mx_edi_locality_id;''')
env.cr.execute('''DROP TABLE IF EXISTS l10n_mx_edi_locality''')

env.cr.execute('''DELETE FROM ir_model WHERE model='l10n_mx_edi.tariff.fraction' ''')
env.cr.execute('''DELETE FROM ir_model WHERE model='l10n_mx_edi.res.locality' ''')
env.cr.execute('''DELETE FROM ir_model_fields WHERE name = 'l10n_mx_edi_tariff_fraction_id' and model='product.template' ''')
env.cr.execute('''DELETE FROM ir_model_fields WHERE name = 'l10n_mx_edi_tariff_fraction_id' and model='product.product' ''')
env.cr.execute('''DELETE FROM ir_model_fields WHERE name = 'l10n_mx_edi_locality_id' and model='res.company' ''')