[FIX] mrp: Error on translations was fixed

After of this commit 12a2bd67, returns a
traceback when overwrite the translations (Spanish by example)

The error is
ERROR: ON CONFLICT DO UPDATE command cannot affect row a
second time
HINT:  Ensure that no rows proposed for insertion within the same
command have duplicate constrained values.

And is returned because the field field_mrp_routing__location_id now
have 2 translations

closes odoo/odoo#39680

Signed-off-by: Olivier Dony (odo) <odo@openerp.com>

addons/mrp/i18n/mrp.pot

@@ -2567,7 +2567,6 @@ msgstr ""
 
 #. module: mrp
 #: model:ir.model.fields,field_description:mrp.field_mrp_production__production_location_id
-#: model:ir.model.fields,field_description:mrp.field_mrp_routing__location_id
 #: model_terms:ir.ui.view,arch_db:mrp.mrp_routing_search_view
 msgid "Production Location"
 msgstr ""