[FIX] l10n_at: fix tax repartition to keep it consistent with 12.2

There was an error in this tax's repartition. A tag was wrongly added to its base.

closes odoo/odoo#34245

Signed-off-by: Josse Colpaert <jco@openerp.com>

addons/l10n_at/data/account_tax_data.xml

@@ -234,7 +234,6 @@
                     'factor_percent': 100,
                     'repartition_type': 'base',
                     'minus_report_line_ids': [ref('tax_report_ust_steuern_innergemeinschaft_steu_bmg_20')],
-                    'plus_report_line_ids': [ref('tax_report_bemess_vorst_rechnungen_20')],
                 }),
                 (0,0, {
                     'factor_percent': 100,
@@ -254,7 +253,6 @@
                     'factor_percent': 100,
                     'repartition_type': 'base',
                     'plus_report_line_ids': [ref('tax_report_ust_steuern_innergemeinschaft_steu_bmg_20')],
-                    'minus_report_line_ids': [ref('tax_report_bemess_vorst_rechnungen_20')],
                 }),
                 (0,0, {
                     'factor_percent': 100,