[IMP] l10n_ec: remove unused field l10n_ec_emission_type

The field was foreseen in advance in the community module,
but the final implementation of the electronic invoicing
did not need it.

Part-of: odoo/odoo#137914

addons/l10n_ec/models/account_journal.py

@@ -22,13 +22,3 @@ class AccountJournal(models.Model):
         for journal in self:
             journal.l10n_ec_require_emission = journal.type == 'sale' and journal.country_code == 'EC' and journal.l10n_latam_use_documents
 
-    # NOTE: Removed in master as it has no use
-    l10n_ec_emission_type = fields.Selection(
-        string="Emission type",
-        selection=[
-            ("pre_printed", "Pre Printed"),
-            ("auto_printer", "Auto Printer"),
-            ("electronic", "Electronic"),
-        ],
-        default="electronic",
-    )